first commit

188 files changed, 15910 insertions, 0 deletions

diff --git a/public/system/library/template/Twig/Autoloader.php b/public/system/library/template/Twig/Autoloader.php
new file mode 100644
index 0000000..14016b2
--- /dev/null
+++ b/public/system/library/template/Twig/Autoloader.php
@@ -0,0 +1,54 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Autoloader class is deprecated since version 1.21 and will be removed in 2.0. Use Composer instead.', E_USER_DEPRECATED);
+
+/**
+ * Autoloads Twig classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.21 and will be removed in 2.0. Use Composer instead. 2.0.
+ */
+class Twig_Autoloader
+{
+    /**
+     * Registers Twig_Autoloader as an SPL autoloader.
+     *
+     * @param bool $prepend Whether to prepend the autoloader or not.
+     */
+    public static function register($prepend = false)
+    {
+        @trigger_error('Using Twig_Autoloader is deprecated since version 1.21. Use Composer instead.', E_USER_DEPRECATED);
+
+        if (PHP_VERSION_ID < 50300) {
+            spl_autoload_register(array(__CLASS__, 'autoload'));
+        } else {
+            spl_autoload_register(array(__CLASS__, 'autoload'), true, $prepend);
+        }
+    }
+
+    /**
+     * Handles autoloading of classes.
+     *
+     * @param string $class A class name.
+     */
+    public static function autoload($class)
+    {
+        if (0 !== strpos($class, 'Twig')) {
+            return;
+        }
+
+        if (is_file($file = dirname(__FILE__).'/../'.str_replace(array('_', "\0"), array('/', ''), $class).'.php')) {
+            require $file;
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/BaseNodeVisitor.php b/public/system/library/template/Twig/BaseNodeVisitor.php
new file mode 100644
index 0000000..3c6ef66
--- /dev/null
+++ b/public/system/library/template/Twig/BaseNodeVisitor.php
@@ -0,0 +1,62 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_BaseNodeVisitor can be used to make node visitors compatible with Twig 1.x and 2.x.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class Twig_BaseNodeVisitor implements Twig_NodeVisitorInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    final public function enterNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if (!$node instanceof Twig_Node) {
+            throw new LogicException('Twig_BaseNodeVisitor only supports Twig_Node instances.');
+        }
+
+        return $this->doEnterNode($node, $env);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    final public function leaveNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if (!$node instanceof Twig_Node) {
+            throw new LogicException('Twig_BaseNodeVisitor only supports Twig_Node instances.');
+        }
+
+        return $this->doLeaveNode($node, $env);
+    }
+
+    /**
+     * Called before child nodes are visited.
+     *
+     * @param Twig_Node        $node The node to visit
+     * @param Twig_Environment $env  The Twig environment instance
+     *
+     * @return Twig_Node The modified node
+     */
+    abstract protected function doEnterNode(Twig_Node $node, Twig_Environment $env);
+
+    /**
+     * Called after child nodes are visited.
+     *
+     * @param Twig_Node        $node The node to visit
+     * @param Twig_Environment $env  The Twig environment instance
+     *
+     * @return Twig_Node|false The modified node or false if the node must be removed
+     */
+    abstract protected function doLeaveNode(Twig_Node $node, Twig_Environment $env);
+}
diff --git a/public/system/library/template/Twig/Cache/Filesystem.php b/public/system/library/template/Twig/Cache/Filesystem.php
new file mode 100644
index 0000000..9e70ca9
--- /dev/null
+++ b/public/system/library/template/Twig/Cache/Filesystem.php
@@ -0,0 +1,98 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Implements a cache on the filesystem.
+ *
+ * @author Andrew Tch <andrew@noop.lv>
+ */
+class Twig_Cache_Filesystem implements Twig_CacheInterface
+{
+    const FORCE_BYTECODE_INVALIDATION = 1;
+
+    private $directory;
+    private $options;
+
+    /**
+     * @param $directory string The root cache directory
+     * @param $options   int    A set of options
+     */
+    public function __construct($directory, $options = 0)
+    {
+        $this->directory = rtrim($directory, '\/').'/';
+        $this->options = $options;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function generateKey($name, $className)
+    {
+        $hash = hash('sha256', $className);
+
+        return $this->directory.$hash[0].$hash[1].'/'.$hash.'.php';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function load($key)
+    {
+        if (file_exists($key)) {
+            @include_once $key;
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function write($key, $content)
+    {
+        $dir = dirname($key);
+        if (!is_dir($dir)) {
+            if (false === @mkdir($dir, 0777, true) && !is_dir($dir)) {
+                throw new RuntimeException(sprintf('Unable to create the cache directory (%s).', $dir));
+            }
+        } elseif (!is_writable($dir)) {
+            throw new RuntimeException(sprintf('Unable to write in the cache directory (%s).', $dir));
+        }
+
+        $tmpFile = tempnam($dir, basename($key));
+        if (false !== @file_put_contents($tmpFile, $content) && @rename($tmpFile, $key)) {
+            @chmod($key, 0666 & ~umask());
+
+            if (self::FORCE_BYTECODE_INVALIDATION == ($this->options & self::FORCE_BYTECODE_INVALIDATION)) {
+                // Compile cached file into bytecode cache
+                if (function_exists('opcache_invalidate')) {
+                    opcache_invalidate($key, true);
+                } elseif (function_exists('apc_compile_file')) {
+                    apc_compile_file($key);
+                }
+            }
+
+            return;
+        }
+
+        throw new RuntimeException(sprintf('Failed to write cache file "%s".', $key));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getTimestamp($key)
+    {
+        if (!file_exists($key)) {
+            return 0;
+        }
+
+        return (int) @filemtime($key);
+    }
+}
diff --git a/public/system/library/template/Twig/Cache/Null.php b/public/system/library/template/Twig/Cache/Null.php
new file mode 100644
index 0000000..fde8c80
--- /dev/null
+++ b/public/system/library/template/Twig/Cache/Null.php
@@ -0,0 +1,48 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Implements a no-cache strategy.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Cache_Null implements Twig_CacheInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function generateKey($name, $className)
+    {
+        return '';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function write($key, $content)
+    {
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function load($key)
+    {
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getTimestamp($key)
+    {
+        return 0;
+    }
+}
diff --git a/public/system/library/template/Twig/CacheInterface.php b/public/system/library/template/Twig/CacheInterface.php
new file mode 100644
index 0000000..9b17e0f
--- /dev/null
+++ b/public/system/library/template/Twig/CacheInterface.php
@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by cache classes.
+ *
+ * It is highly recommended to always store templates on the filesystem to
+ * benefit from the PHP opcode cache. This interface is mostly useful if you
+ * need to implement a custom strategy for storing templates on the filesystem.
+ *
+ * @author Andrew Tch <andrew@noop.lv>
+ */
+interface Twig_CacheInterface
+{
+    /**
+     * Generates a cache key for the given template class name.
+     *
+     * @param string $name      The template name
+     * @param string $className The template class name
+     *
+     * @return string
+     */
+    public function generateKey($name, $className);
+
+    /**
+     * Writes the compiled template to cache.
+     *
+     * @param string $key     The cache key
+     * @param string $content The template representation as a PHP class
+     */
+    public function write($key, $content);
+
+    /**
+     * Loads a template from the cache.
+     *
+     * @param string $key The cache key
+     */
+    public function load($key);
+
+    /**
+     * Returns the modification timestamp of a key.
+     *
+     * @param string $key The cache key
+     *
+     * @return int
+     */
+    public function getTimestamp($key);
+}
diff --git a/public/system/library/template/Twig/Compiler.php b/public/system/library/template/Twig/Compiler.php
new file mode 100644
index 0000000..abea3aa
--- /dev/null
+++ b/public/system/library/template/Twig/Compiler.php
@@ -0,0 +1,277 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Compiles a node to PHP code.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Compiler implements Twig_CompilerInterface
+{
+    protected $lastLine;
+    protected $source;
+    protected $indentation;
+    protected $env;
+    protected $debugInfo = array();
+    protected $sourceOffset;
+    protected $sourceLine;
+    protected $filename;
+
+    /**
+     * Constructor.
+     *
+     * @param Twig_Environment $env The twig environment instance
+     */
+    public function __construct(Twig_Environment $env)
+    {
+        $this->env = $env;
+    }
+
+    public function getFilename()
+    {
+        return $this->filename;
+    }
+
+    /**
+     * Returns the environment instance related to this compiler.
+     *
+     * @return Twig_Environment The environment instance
+     */
+    public function getEnvironment()
+    {
+        return $this->env;
+    }
+
+    /**
+     * Gets the current PHP code after compilation.
+     *
+     * @return string The PHP code
+     */
+    public function getSource()
+    {
+        return $this->source;
+    }
+
+    /**
+     * Compiles a node.
+     *
+     * @param Twig_NodeInterface $node        The node to compile
+     * @param int                $indentation The current indentation
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function compile(Twig_NodeInterface $node, $indentation = 0)
+    {
+        $this->lastLine = null;
+        $this->source = '';
+        $this->debugInfo = array();
+        $this->sourceOffset = 0;
+        // source code starts at 1 (as we then increment it when we encounter new lines)
+        $this->sourceLine = 1;
+        $this->indentation = $indentation;
+
+        if ($node instanceof Twig_Node_Module) {
+            $this->filename = $node->getAttribute('filename');
+        }
+
+        $node->compile($this);
+
+        return $this;
+    }
+
+    public function subcompile(Twig_NodeInterface $node, $raw = true)
+    {
+        if (false === $raw) {
+            $this->addIndentation();
+        }
+
+        $node->compile($this);
+
+        return $this;
+    }
+
+    /**
+     * Adds a raw string to the compiled code.
+     *
+     * @param string $string The string
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function raw($string)
+    {
+        $this->source .= $string;
+
+        return $this;
+    }
+
+    /**
+     * Writes a string to the compiled code by adding indentation.
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function write()
+    {
+        $strings = func_get_args();
+        foreach ($strings as $string) {
+            $this->addIndentation();
+            $this->source .= $string;
+        }
+
+        return $this;
+    }
+
+    /**
+     * Appends an indentation to the current PHP code after compilation.
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function addIndentation()
+    {
+        $this->source .= str_repeat(' ', $this->indentation * 4);
+
+        return $this;
+    }
+
+    /**
+     * Adds a quoted string to the compiled code.
+     *
+     * @param string $value The string
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function string($value)
+    {
+        $this->source .= sprintf('"%s"', addcslashes($value, "\0\t\"\$\\"));
+
+        return $this;
+    }
+
+    /**
+     * Returns a PHP representation of a given value.
+     *
+     * @param mixed $value The value to convert
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function repr($value)
+    {
+        if (is_int($value) || is_float($value)) {
+            if (false !== $locale = setlocale(LC_NUMERIC, 0)) {
+                setlocale(LC_NUMERIC, 'C');
+            }
+
+            $this->raw($value);
+
+            if (false !== $locale) {
+                setlocale(LC_NUMERIC, $locale);
+            }
+        } elseif (null === $value) {
+            $this->raw('null');
+        } elseif (is_bool($value)) {
+            $this->raw($value ? 'true' : 'false');
+        } elseif (is_array($value)) {
+            $this->raw('array(');
+            $first = true;
+            foreach ($value as $key => $v) {
+                if (!$first) {
+                    $this->raw(', ');
+                }
+                $first = false;
+                $this->repr($key);
+                $this->raw(' => ');
+                $this->repr($v);
+            }
+            $this->raw(')');
+        } else {
+            $this->string($value);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Adds debugging information.
+     *
+     * @param Twig_NodeInterface $node The related twig node
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function addDebugInfo(Twig_NodeInterface $node)
+    {
+        if ($node->getLine() != $this->lastLine) {
+            $this->write(sprintf("// line %d\n", $node->getLine()));
+
+            // when mbstring.func_overload is set to 2
+            // mb_substr_count() replaces substr_count()
+            // but they have different signatures!
+            if (((int) ini_get('mbstring.func_overload')) & 2) {
+                // this is much slower than the "right" version
+                $this->sourceLine += mb_substr_count(mb_substr($this->source, $this->sourceOffset), "\n");
+            } else {
+                $this->sourceLine += substr_count($this->source, "\n", $this->sourceOffset);
+            }
+            $this->sourceOffset = strlen($this->source);
+            $this->debugInfo[$this->sourceLine] = $node->getLine();
+
+            $this->lastLine = $node->getLine();
+        }
+
+        return $this;
+    }
+
+    public function getDebugInfo()
+    {
+        ksort($this->debugInfo);
+
+        return $this->debugInfo;
+    }
+
+    /**
+     * Indents the generated code.
+     *
+     * @param int $step The number of indentation to add
+     *
+     * @return Twig_Compiler The current compiler instance
+     */
+    public function indent($step = 1)
+    {
+        $this->indentation += $step;
+
+        return $this;
+    }
+
+    /**
+     * Outdents the generated code.
+     *
+     * @param int $step The number of indentation to remove
+     *
+     * @return Twig_Compiler The current compiler instance
+     *
+     * @throws LogicException When trying to outdent too much so the indentation would become negative
+     */
+    public function outdent($step = 1)
+    {
+        // can't outdent by more steps than the current indentation level
+        if ($this->indentation < $step) {
+            throw new LogicException('Unable to call outdent() as the indentation would become negative');
+        }
+
+        $this->indentation -= $step;
+
+        return $this;
+    }
+
+    public function getVarName()
+    {
+        return sprintf('__internal_%s', hash('sha256', uniqid(mt_rand(), true), false));
+    }
+}
diff --git a/public/system/library/template/Twig/CompilerInterface.php b/public/system/library/template/Twig/CompilerInterface.php
new file mode 100644
index 0000000..272c767
--- /dev/null
+++ b/public/system/library/template/Twig/CompilerInterface.php
@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by compiler classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 3.0)
+ */
+interface Twig_CompilerInterface
+{
+    /**
+     * Compiles a node.
+     *
+     * @param Twig_NodeInterface $node The node to compile
+     *
+     * @return Twig_CompilerInterface The current compiler instance
+     */
+    public function compile(Twig_NodeInterface $node);
+
+    /**
+     * Gets the current PHP code after compilation.
+     *
+     * @return string The PHP code
+     */
+    public function getSource();
+}
diff --git a/public/system/library/template/Twig/Environment.php b/public/system/library/template/Twig/Environment.php
new file mode 100644
index 0000000..a2e087a
--- /dev/null
+++ b/public/system/library/template/Twig/Environment.php
@@ -0,0 +1,1418 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Stores the Twig configuration.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Environment
+{
+    const VERSION = '1.24.2-DEV';
+
+    protected $charset;
+    protected $loader;
+    protected $debug;
+    protected $autoReload;
+    protected $cache;
+    protected $lexer;
+    protected $parser;
+    protected $compiler;
+    protected $baseTemplateClass;
+    protected $extensions;
+    protected $parsers;
+    protected $visitors;
+    protected $filters;
+    protected $tests;
+    protected $functions;
+    protected $globals;
+    protected $runtimeInitialized = false;
+    protected $extensionInitialized = false;
+    protected $loadedTemplates;
+    protected $strictVariables;
+    protected $unaryOperators;
+    protected $binaryOperators;
+    protected $templateClassPrefix = '__TwigTemplate_';
+    protected $functionCallbacks = array();
+    protected $filterCallbacks = array();
+    protected $staging;
+
+    private $originalCache;
+    private $bcWriteCacheFile = false;
+    private $bcGetCacheFilename = false;
+    private $lastModifiedExtension = 0;
+
+    /**
+     * Constructor.
+     *
+     * Available options:
+     *
+     *  * debug: When set to true, it automatically set "auto_reload" to true as
+     *           well (default to false).
+     *
+     *  * charset: The charset used by the templates (default to UTF-8).
+     *
+     *  * base_template_class: The base template class to use for generated
+     *                         templates (default to Twig_Template).
+     *
+     *  * cache: An absolute path where to store the compiled templates,
+     *           a Twig_Cache_Interface implementation,
+     *           or false to disable compilation cache (default).
+     *
+     *  * auto_reload: Whether to reload the template if the original source changed.
+     *                 If you don't provide the auto_reload option, it will be
+     *                 determined automatically based on the debug value.
+     *
+     *  * strict_variables: Whether to ignore invalid variables in templates
+     *                      (default to false).
+     *
+     *  * autoescape: Whether to enable auto-escaping (default to html):
+     *                  * false: disable auto-escaping
+     *                  * true: equivalent to html
+     *                  * html, js: set the autoescaping to one of the supported strategies
+     *                  * filename: set the autoescaping strategy based on the template filename extension
+     *                  * PHP callback: a PHP callback that returns an escaping strategy based on the template "filename"
+     *
+     *  * optimizations: A flag that indicates which optimizations to apply
+     *                   (default to -1 which means that all optimizations are enabled;
+     *                   set it to 0 to disable).
+     *
+     * @param Twig_LoaderInterface $loader  A Twig_LoaderInterface instance
+     * @param array                $options An array of options
+     */
+    public function __construct(Twig_LoaderInterface $loader = null, $options = array())
+    {
+        if (null !== $loader) {
+            $this->setLoader($loader);
+        } else {
+            @trigger_error('Not passing a Twig_LoaderInterface as the first constructor argument of Twig_Environment is deprecated since version 1.21.', E_USER_DEPRECATED);
+        }
+
+        $options = array_merge(array(
+            'debug' => false,
+            'charset' => 'UTF-8',
+            'base_template_class' => 'Twig_Template',
+            'strict_variables' => false,
+            'autoescape' => 'html',
+            'cache' => false,
+            'auto_reload' => null,
+            'optimizations' => -1,
+        ), $options);
+
+        $this->debug = (bool) $options['debug'];
+        $this->charset = strtoupper($options['charset']);
+        $this->baseTemplateClass = $options['base_template_class'];
+        $this->autoReload = null === $options['auto_reload'] ? $this->debug : (bool) $options['auto_reload'];
+        $this->strictVariables = (bool) $options['strict_variables'];
+        $this->setCache($options['cache']);
+
+        $this->addExtension(new Twig_Extension_Core());
+        $this->addExtension(new Twig_Extension_Escaper($options['autoescape']));
+        $this->addExtension(new Twig_Extension_Optimizer($options['optimizations']));
+        $this->staging = new Twig_Extension_Staging();
+
+        // For BC
+        if (is_string($this->originalCache)) {
+            $r = new ReflectionMethod($this, 'writeCacheFile');
+            if ($r->getDeclaringClass()->getName() !== __CLASS__) {
+                @trigger_error('The Twig_Environment::writeCacheFile method is deprecated since version 1.22 and will be removed in Twig 2.0.', E_USER_DEPRECATED);
+
+                $this->bcWriteCacheFile = true;
+            }
+
+            $r = new ReflectionMethod($this, 'getCacheFilename');
+            if ($r->getDeclaringClass()->getName() !== __CLASS__) {
+                @trigger_error('The Twig_Environment::getCacheFilename method is deprecated since version 1.22 and will be removed in Twig 2.0.', E_USER_DEPRECATED);
+
+                $this->bcGetCacheFilename = true;
+            }
+        }
+    }
+
+    /**
+     * Gets the base template class for compiled templates.
+     *
+     * @return string The base template class name
+     */
+    public function getBaseTemplateClass()
+    {
+        return $this->baseTemplateClass;
+    }
+
+    /**
+     * Sets the base template class for compiled templates.
+     *
+     * @param string $class The base template class name
+     */
+    public function setBaseTemplateClass($class)
+    {
+        $this->baseTemplateClass = $class;
+    }
+
+    /**
+     * Enables debugging mode.
+     */
+    public function enableDebug()
+    {
+        $this->debug = true;
+    }
+
+    /**
+     * Disables debugging mode.
+     */
+    public function disableDebug()
+    {
+        $this->debug = false;
+    }
+
+    /**
+     * Checks if debug mode is enabled.
+     *
+     * @return bool true if debug mode is enabled, false otherwise
+     */
+    public function isDebug()
+    {
+        return $this->debug;
+    }
+
+    /**
+     * Enables the auto_reload option.
+     */
+    public function enableAutoReload()
+    {
+        $this->autoReload = true;
+    }
+
+    /**
+     * Disables the auto_reload option.
+     */
+    public function disableAutoReload()
+    {
+        $this->autoReload = false;
+    }
+
+    /**
+     * Checks if the auto_reload option is enabled.
+     *
+     * @return bool true if auto_reload is enabled, false otherwise
+     */
+    public function isAutoReload()
+    {
+        return $this->autoReload;
+    }
+
+    /**
+     * Enables the strict_variables option.
+     */
+    public function enableStrictVariables()
+    {
+        $this->strictVariables = true;
+    }
+
+    /**
+     * Disables the strict_variables option.
+     */
+    public function disableStrictVariables()
+    {
+        $this->strictVariables = false;
+    }
+
+    /**
+     * Checks if the strict_variables option is enabled.
+     *
+     * @return bool true if strict_variables is enabled, false otherwise
+     */
+    public function isStrictVariables()
+    {
+        return $this->strictVariables;
+    }
+
+    /**
+     * Gets the current cache implementation.
+     *
+     * @param bool $original Whether to return the original cache option or the real cache instance
+     *
+     * @return Twig_CacheInterface|string|false A Twig_CacheInterface implementation,
+     *                                          an absolute path to the compiled templates,
+     *                                          or false to disable cache
+     */
+    public function getCache($original = true)
+    {
+        return $original ? $this->originalCache : $this->cache;
+    }
+
+    /**
+     * Sets the current cache implementation.
+     *
+     * @param Twig_CacheInterface|string|false $cache A Twig_CacheInterface implementation,
+     *                                                an absolute path to the compiled templates,
+     *                                                or false to disable cache
+     */
+    public function setCache($cache)
+    {
+        if (is_string($cache)) {
+            $this->originalCache = $cache;
+            $this->cache = new Twig_Cache_Filesystem($cache);
+        } elseif (false === $cache) {
+            $this->originalCache = $cache;
+            $this->cache = new Twig_Cache_Null();
+        } elseif (null === $cache) {
+            @trigger_error('Using "null" as the cache strategy is deprecated since version 1.23 and will be removed in Twig 2.0.', E_USER_DEPRECATED);
+            $this->originalCache = false;
+            $this->cache = new Twig_Cache_Null();
+        } elseif ($cache instanceof Twig_CacheInterface) {
+            $this->originalCache = $this->cache = $cache;
+        } else {
+            throw new LogicException(sprintf('Cache can only be a string, false, or a Twig_CacheInterface implementation.'));
+        }
+    }
+
+    /**
+     * Gets the cache filename for a given template.
+     *
+     * @param string $name The template name
+     *
+     * @return string|false The cache file name or false when caching is disabled
+     *
+     * @deprecated since 1.22 (to be removed in 2.0)
+     */
+    public function getCacheFilename($name)
+    {
+        @trigger_error(sprintf('The %s method is deprecated since version 1.22 and will be removed in Twig 2.0.', __METHOD__), E_USER_DEPRECATED);
+
+        $key = $this->cache->generateKey($name, $this->getTemplateClass($name));
+
+        return !$key ? false : $key;
+    }
+
+    /**
+     * Gets the template class associated with the given string.
+     *
+     * The generated template class is based on the following parameters:
+     *
+     *  * The cache key for the given template;
+     *  * The currently enabled extensions;
+     *  * Whether the Twig C extension is available or not.
+     *
+     * @param string   $name  The name for which to calculate the template class name
+     * @param int|null $index The index if it is an embedded template
+     *
+     * @return string The template class name
+     */
+    public function getTemplateClass($name, $index = null)
+    {
+        $key = $this->getLoader()->getCacheKey($name);
+        $key .= json_encode(array_keys($this->extensions));
+        $key .= function_exists('twig_template_get_attributes');
+
+        return $this->templateClassPrefix.hash('sha256', $key).(null === $index ? '' : '_'.$index);
+    }
+
+    /**
+     * Gets the template class prefix.
+     *
+     * @return string The template class prefix
+     *
+     * @deprecated since 1.22 (to be removed in 2.0)
+     */
+    public function getTemplateClassPrefix()
+    {
+        @trigger_error(sprintf('The %s method is deprecated since version 1.22 and will be removed in Twig 2.0.', __METHOD__), E_USER_DEPRECATED);
+
+        return $this->templateClassPrefix;
+    }
+
+    /**
+     * Renders a template.
+     *
+     * @param string $name    The template name
+     * @param array  $context An array of parameters to pass to the template
+     *
+     * @return string The rendered template
+     *
+     * @throws Twig_Error_Loader  When the template cannot be found
+     * @throws Twig_Error_Syntax  When an error occurred during compilation
+     * @throws Twig_Error_Runtime When an error occurred during rendering
+     */
+    public function render($name, array $context = array())
+    {
+        return $this->loadTemplate($name)->render($context);
+    }
+
+    /**
+     * Displays a template.
+     *
+     * @param string $name    The template name
+     * @param array  $context An array of parameters to pass to the template
+     *
+     * @throws Twig_Error_Loader  When the template cannot be found
+     * @throws Twig_Error_Syntax  When an error occurred during compilation
+     * @throws Twig_Error_Runtime When an error occurred during rendering
+     */
+    public function display($name, array $context = array())
+    {
+        $this->loadTemplate($name)->display($context);
+    }
+
+    /**
+     * Loads a template by name.
+     *
+     * @param string $name  The template name
+     * @param int    $index The index if it is an embedded template
+     *
+     * @return Twig_TemplateInterface A template instance representing the given template name
+     *
+     * @throws Twig_Error_Loader When the template cannot be found
+     * @throws Twig_Error_Syntax When an error occurred during compilation
+     */
+    public function loadTemplate($name, $index = null)
+    {
+        $cls = $this->getTemplateClass($name, $index);
+
+        if (isset($this->loadedTemplates[$cls])) {
+            return $this->loadedTemplates[$cls];
+        }
+
+        if (!class_exists($cls, false)) {
+            if ($this->bcGetCacheFilename) {
+                $key = $this->getCacheFilename($name);
+            } else {
+                $key = $this->cache->generateKey($name, $cls);
+            }
+
+            if (!$this->isAutoReload() || $this->isTemplateFresh($name, $this->cache->getTimestamp($key))) {
+                $this->cache->load($key);
+            }
+
+            if (!class_exists($cls, false)) {
+                $content = $this->compileSource($this->getLoader()->getSource($name), $name);
+                if ($this->bcWriteCacheFile) {
+                    $this->writeCacheFile($key, $content);
+                } else {
+                    $this->cache->write($key, $content);
+                }
+
+                eval('?>'.$content);
+            }
+        }
+
+        if (!$this->runtimeInitialized) {
+            $this->initRuntime();
+        }
+
+        return $this->loadedTemplates[$cls] = new $cls($this);
+    }
+
+    /**
+     * Creates a template from source.
+     *
+     * This method should not be used as a generic way to load templates.
+     *
+     * @param string $template The template name
+     *
+     * @return Twig_Template A template instance representing the given template name
+     *
+     * @throws Twig_Error_Loader When the template cannot be found
+     * @throws Twig_Error_Syntax When an error occurred during compilation
+     */
+    public function createTemplate($template)
+    {
+        $name = sprintf('__string_template__%s', hash('sha256', uniqid(mt_rand(), true), false));
+
+        $loader = new Twig_Loader_Chain(array(
+            new Twig_Loader_Array(array($name => $template)),
+            $current = $this->getLoader(),
+        ));
+
+        $this->setLoader($loader);
+        try {
+            $template = $this->loadTemplate($name);
+        } catch (Exception $e) {
+            $this->setLoader($current);
+
+            throw $e;
+        } catch (Throwable $e) {
+            $this->setLoader($current);
+
+            throw $e;
+        }
+        $this->setLoader($current);
+
+        return $template;
+    }
+
+    /**
+     * Returns true if the template is still fresh.
+     *
+     * Besides checking the loader for freshness information,
+     * this method also checks if the enabled extensions have
+     * not changed.
+     *
+     * @param string $name The template name
+     * @param int    $time The last modification time of the cached template
+     *
+     * @return bool true if the template is fresh, false otherwise
+     */
+    public function isTemplateFresh($name, $time)
+    {
+        if (0 === $this->lastModifiedExtension) {
+            foreach ($this->extensions as $extension) {
+                $r = new ReflectionObject($extension);
+                if (file_exists($r->getFileName()) && ($extensionTime = filemtime($r->getFileName())) > $this->lastModifiedExtension) {
+                    $this->lastModifiedExtension = $extensionTime;
+                }
+            }
+        }
+
+        return $this->lastModifiedExtension <= $time && $this->getLoader()->isFresh($name, $time);
+    }
+
+    /**
+     * Tries to load a template consecutively from an array.
+     *
+     * Similar to loadTemplate() but it also accepts Twig_TemplateInterface instances and an array
+     * of templates where each is tried to be loaded.
+     *
+     * @param string|Twig_Template|array $names A template or an array of templates to try consecutively
+     *
+     * @return Twig_Template
+     *
+     * @throws Twig_Error_Loader When none of the templates can be found
+     * @throws Twig_Error_Syntax When an error occurred during compilation
+     */
+    public function resolveTemplate($names)
+    {
+        if (!is_array($names)) {
+            $names = array($names);
+        }
+
+        foreach ($names as $name) {
+            if ($name instanceof Twig_Template) {
+                return $name;
+            }
+
+            try {
+                return $this->loadTemplate($name);
+            } catch (Twig_Error_Loader $e) {
+            }
+        }
+
+        if (1 === count($names)) {
+            throw $e;
+        }
+
+        throw new Twig_Error_Loader(sprintf('Unable to find one of the following templates: "%s".', implode('", "', $names)));
+    }
+
+    /**
+     * Clears the internal template cache.
+     *
+     * @deprecated since 1.18.3 (to be removed in 2.0)
+     */
+    public function clearTemplateCache()
+    {
+        @trigger_error(sprintf('The %s method is deprecated since version 1.18.3 and will be removed in Twig 2.0.', __METHOD__), E_USER_DEPRECATED);
+
+        $this->loadedTemplates = array();
+    }
+
+    /**
+     * Clears the template cache files on the filesystem.
+     *
+     * @deprecated since 1.22 (to be removed in 2.0)
+     */
+    public function clearCacheFiles()
+    {
+        @trigger_error(sprintf('The %s method is deprecated since version 1.22 and will be removed in Twig 2.0.', __METHOD__), E_USER_DEPRECATED);
+
+        if (is_string($this->originalCache)) {
+            foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator($this->originalCache), RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
+                if ($file->isFile()) {
+                    @unlink($file->getPathname());
+                }
+            }
+        }
+    }
+
+    /**
+     * Gets the Lexer instance.
+     *
+     * @return Twig_LexerInterface A Twig_LexerInterface instance
+     */
+    public function getLexer()
+    {
+        if (null === $this->lexer) {
+            $this->lexer = new Twig_Lexer($this);
+        }
+
+        return $this->lexer;
+    }
+
+    /**
+     * Sets the Lexer instance.
+     *
+     * @param Twig_LexerInterface $lexer A Twig_LexerInterface instance
+     */
+    public function setLexer(Twig_LexerInterface $lexer)
+    {
+        $this->lexer = $lexer;
+    }
+
+    /**
+     * Tokenizes a source code.
+     *
+     * @param string $source The template source code
+     * @param string $name   The template name
+     *
+     * @return Twig_TokenStream A Twig_TokenStream instance
+     *
+     * @throws Twig_Error_Syntax When the code is syntactically wrong
+     */
+    public function tokenize($source, $name = null)
+    {
+        return $this->getLexer()->tokenize($source, $name);
+    }
+
+    /**
+     * Gets the Parser instance.
+     *
+     * @return Twig_ParserInterface A Twig_ParserInterface instance
+     */
+    public function getParser()
+    {
+        if (null === $this->parser) {
+            $this->parser = new Twig_Parser($this);
+        }
+
+        return $this->parser;
+    }
+
+    /**
+     * Sets the Parser instance.
+     *
+     * @param Twig_ParserInterface $parser A Twig_ParserInterface instance
+     */
+    public function setParser(Twig_ParserInterface $parser)
+    {
+        $this->parser = $parser;
+    }
+
+    /**
+     * Converts a token stream to a node tree.
+     *
+     * @param Twig_TokenStream $stream A token stream instance
+     *
+     * @return Twig_Node_Module A node tree
+     *
+     * @throws Twig_Error_Syntax When the token stream is syntactically or semantically wrong
+     */
+    public function parse(Twig_TokenStream $stream)
+    {
+        return $this->getParser()->parse($stream);
+    }
+
+    /**
+     * Gets the Compiler instance.
+     *
+     * @return Twig_CompilerInterface A Twig_CompilerInterface instance
+     */
+    public function getCompiler()
+    {
+        if (null === $this->compiler) {
+            $this->compiler = new Twig_Compiler($this);
+        }
+
+        return $this->compiler;
+    }
+
+    /**
+     * Sets the Compiler instance.
+     *
+     * @param Twig_CompilerInterface $compiler A Twig_CompilerInterface instance
+     */
+    public function setCompiler(Twig_CompilerInterface $compiler)
+    {
+        $this->compiler = $compiler;
+    }
+
+    /**
+     * Compiles a node and returns the PHP code.
+     *
+     * @param Twig_NodeInterface $node A Twig_NodeInterface instance
+     *
+     * @return string The compiled PHP source code
+     */
+    public function compile(Twig_NodeInterface $node)
+    {
+        return $this->getCompiler()->compile($node)->getSource();
+    }
+
+    /**
+     * Compiles a template source code.
+     *
+     * @param string $source The template source code
+     * @param string $name   The template name
+     *
+     * @return string The compiled PHP source code
+     *
+     * @throws Twig_Error_Syntax When there was an error during tokenizing, parsing or compiling
+     */
+    public function compileSource($source, $name = null)
+    {
+        try {
+            $compiled = $this->compile($this->parse($this->tokenize($source, $name)), $source);
+
+            if (isset($source[0])) {
+                $compiled .= '/* '.str_replace(array('*/', "\r\n", "\r", "\n"), array('*//* ', "\n", "\n", "*/\n/* "), $source)."*/\n";
+            }
+
+            return $compiled;
+        } catch (Twig_Error $e) {
+            $e->setTemplateFile($name);
+            throw $e;
+        } catch (Exception $e) {
+            throw new Twig_Error_Syntax(sprintf('An exception has been thrown during the compilation of a template ("%s").', $e->getMessage()), -1, $name, $e);
+        }
+    }
+
+    /**
+     * Sets the Loader instance.
+     *
+     * @param Twig_LoaderInterface $loader A Twig_LoaderInterface instance
+     */
+    public function setLoader(Twig_LoaderInterface $loader)
+    {
+        $this->loader = $loader;
+    }
+
+    /**
+     * Gets the Loader instance.
+     *
+     * @return Twig_LoaderInterface A Twig_LoaderInterface instance
+     */
+    public function getLoader()
+    {
+        if (null === $this->loader) {
+            throw new LogicException('You must set a loader first.');
+        }
+
+        return $this->loader;
+    }
+
+    /**
+     * Sets the default template charset.
+     *
+     * @param string $charset The default charset
+     */
+    public function setCharset($charset)
+    {
+        $this->charset = strtoupper($charset);
+    }
+
+    /**
+     * Gets the default template charset.
+     *
+     * @return string The default charset
+     */
+    public function getCharset()
+    {
+        return $this->charset;
+    }
+
+    /**
+     * Initializes the runtime environment.
+     *
+     * @deprecated since 1.23 (to be removed in 2.0)
+     */
+    public function initRuntime()
+    {
+        $this->runtimeInitialized = true;
+
+        foreach ($this->getExtensions() as $name => $extension) {
+            if (!$extension instanceof Twig_Extension_InitRuntimeInterface) {
+                $m = new ReflectionMethod($extension, 'initRuntime');
+
+                if ('Twig_Extension' !== $m->getDeclaringClass()->getName()) {
+                    @trigger_error(sprintf('Defining the initRuntime() method in the "%s" extension is deprecated since version 1.23. Use the `needs_environment` option to get the Twig_Environment instance in filters, functions, or tests; or explicitly implement Twig_Extension_InitRuntimeInterface if needed (not recommended).', $name), E_USER_DEPRECATED);
+                }
+            }
+
+            $extension->initRuntime($this);
+        }
+    }
+
+    /**
+     * Returns true if the given extension is registered.
+     *
+     * @param string $name The extension name
+     *
+     * @return bool Whether the extension is registered or not
+     */
+    public function hasExtension($name)
+    {
+        return isset($this->extensions[$name]);
+    }
+
+    /**
+     * Gets an extension by name.
+     *
+     * @param string $name The extension name
+     *
+     * @return Twig_ExtensionInterface A Twig_ExtensionInterface instance
+     */
+    public function getExtension($name)
+    {
+        if (!isset($this->extensions[$name])) {
+            throw new Twig_Error_Runtime(sprintf('The "%s" extension is not enabled.', $name));
+        }
+
+        return $this->extensions[$name];
+    }
+
+    /**
+     * Registers an extension.
+     *
+     * @param Twig_ExtensionInterface $extension A Twig_ExtensionInterface instance
+     */
+    public function addExtension(Twig_ExtensionInterface $extension)
+    {
+        $name = $extension->getName();
+
+        if ($this->extensionInitialized) {
+            throw new LogicException(sprintf('Unable to register extension "%s" as extensions have already been initialized.', $name));
+        }
+
+        if (isset($this->extensions[$name])) {
+            @trigger_error(sprintf('The possibility to register the same extension twice ("%s") is deprecated since version 1.23 and will be removed in Twig 2.0. Use proper PHP inheritance instead.', $name), E_USER_DEPRECATED);
+        }
+
+        $this->lastModifiedExtension = 0;
+
+        $this->extensions[$name] = $extension;
+    }
+
+    /**
+     * Removes an extension by name.
+     *
+     * This method is deprecated and you should not use it.
+     *
+     * @param string $name The extension name
+     *
+     * @deprecated since 1.12 (to be removed in 2.0)
+     */
+    public function removeExtension($name)
+    {
+        @trigger_error(sprintf('The %s method is deprecated since version 1.12 and will be removed in Twig 2.0.', __METHOD__), E_USER_DEPRECATED);
+
+        if ($this->extensionInitialized) {
+            throw new LogicException(sprintf('Unable to remove extension "%s" as extensions have already been initialized.', $name));
+        }
+
+        unset($this->extensions[$name]);
+    }
+
+    /**
+     * Registers an array of extensions.
+     *
+     * @param array $extensions An array of extensions
+     */
+    public function setExtensions(array $extensions)
+    {
+        foreach ($extensions as $extension) {
+            $this->addExtension($extension);
+        }
+    }
+
+    /**
+     * Returns all registered extensions.
+     *
+     * @return array An array of extensions
+     */
+    public function getExtensions()
+    {
+        return $this->extensions;
+    }
+
+    /**
+     * Registers a Token Parser.
+     *
+     * @param Twig_TokenParserInterface $parser A Twig_TokenParserInterface instance
+     */
+    public function addTokenParser(Twig_TokenParserInterface $parser)
+    {
+        if ($this->extensionInitialized) {
+            throw new LogicException('Unable to add a token parser as extensions have already been initialized.');
+        }
+
+        $this->staging->addTokenParser($parser);
+    }
+
+    /**
+     * Gets the registered Token Parsers.
+     *
+     * @return Twig_TokenParserBrokerInterface A broker containing token parsers
+     *
+     * @internal
+     */
+    public function getTokenParsers()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->parsers;
+    }
+
+    /**
+     * Gets registered tags.
+     *
+     * Be warned that this method cannot return tags defined by Twig_TokenParserBrokerInterface classes.
+     *
+     * @return Twig_TokenParserInterface[] An array of Twig_TokenParserInterface instances
+     *
+     * @internal
+     */
+    public function getTags()
+    {
+        $tags = array();
+        foreach ($this->getTokenParsers()->getParsers() as $parser) {
+            if ($parser instanceof Twig_TokenParserInterface) {
+                $tags[$parser->getTag()] = $parser;
+            }
+        }
+
+        return $tags;
+    }
+
+    /**
+     * Registers a Node Visitor.
+     *
+     * @param Twig_NodeVisitorInterface $visitor A Twig_NodeVisitorInterface instance
+     */
+    public function addNodeVisitor(Twig_NodeVisitorInterface $visitor)
+    {
+        if ($this->extensionInitialized) {
+            throw new LogicException('Unable to add a node visitor as extensions have already been initialized.');
+        }
+
+        $this->staging->addNodeVisitor($visitor);
+    }
+
+    /**
+     * Gets the registered Node Visitors.
+     *
+     * @return Twig_NodeVisitorInterface[] An array of Twig_NodeVisitorInterface instances
+     *
+     * @internal
+     */
+    public function getNodeVisitors()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->visitors;
+    }
+
+    /**
+     * Registers a Filter.
+     *
+     * @param string|Twig_SimpleFilter               $name   The filter name or a Twig_SimpleFilter instance
+     * @param Twig_FilterInterface|Twig_SimpleFilter $filter A Twig_FilterInterface instance or a Twig_SimpleFilter instance
+     */
+    public function addFilter($name, $filter = null)
+    {
+        if (!$name instanceof Twig_SimpleFilter && !($filter instanceof Twig_SimpleFilter || $filter instanceof Twig_FilterInterface)) {
+            throw new LogicException('A filter must be an instance of Twig_FilterInterface or Twig_SimpleFilter');
+        }
+
+        if ($name instanceof Twig_SimpleFilter) {
+            $filter = $name;
+            $name = $filter->getName();
+        } else {
+            @trigger_error(sprintf('Passing a name as a first argument to the %s method is deprecated since version 1.21. Pass an instance of "Twig_SimpleFilter" instead when defining filter "%s".', __METHOD__, $name), E_USER_DEPRECATED);
+        }
+
+        if ($this->extensionInitialized) {
+            throw new LogicException(sprintf('Unable to add filter "%s" as extensions have already been initialized.', $name));
+        }
+
+        $this->staging->addFilter($name, $filter);
+    }
+
+    /**
+     * Get a filter by name.
+     *
+     * Subclasses may override this method and load filters differently;
+     * so no list of filters is available.
+     *
+     * @param string $name The filter name
+     *
+     * @return Twig_Filter|false A Twig_Filter instance or false if the filter does not exist
+     *
+     * @internal
+     */
+    public function getFilter($name)
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        if (isset($this->filters[$name])) {
+            return $this->filters[$name];
+        }
+
+        foreach ($this->filters as $pattern => $filter) {
+            $pattern = str_replace('\\*', '(.*?)', preg_quote($pattern, '#'), $count);
+
+            if ($count) {
+                if (preg_match('#^'.$pattern.'$#', $name, $matches)) {
+                    array_shift($matches);
+                    $filter->setArguments($matches);
+
+                    return $filter;
+                }
+            }
+        }
+
+        foreach ($this->filterCallbacks as $callback) {
+            if (false !== $filter = call_user_func($callback, $name)) {
+                return $filter;
+            }
+        }
+
+        return false;
+    }
+
+    public function registerUndefinedFilterCallback($callable)
+    {
+        $this->filterCallbacks[] = $callable;
+    }
+
+    /**
+     * Gets the registered Filters.
+     *
+     * Be warned that this method cannot return filters defined with registerUndefinedFilterCallback.
+     *
+     * @return Twig_FilterInterface[] An array of Twig_FilterInterface instances
+     *
+     * @see registerUndefinedFilterCallback
+     *
+     * @internal
+     */
+    public function getFilters()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->filters;
+    }
+
+    /**
+     * Registers a Test.
+     *
+     * @param string|Twig_SimpleTest             $name The test name or a Twig_SimpleTest instance
+     * @param Twig_TestInterface|Twig_SimpleTest $test A Twig_TestInterface instance or a Twig_SimpleTest instance
+     */
+    public function addTest($name, $test = null)
+    {
+        if (!$name instanceof Twig_SimpleTest && !($test instanceof Twig_SimpleTest || $test instanceof Twig_TestInterface)) {
+            throw new LogicException('A test must be an instance of Twig_TestInterface or Twig_SimpleTest');
+        }
+
+        if ($name instanceof Twig_SimpleTest) {
+            $test = $name;
+            $name = $test->getName();
+        } else {
+            @trigger_error(sprintf('Passing a name as a first argument to the %s method is deprecated since version 1.21. Pass an instance of "Twig_SimpleTest" instead when defining test "%s".', __METHOD__, $name), E_USER_DEPRECATED);
+        }
+
+        if ($this->extensionInitialized) {
+            throw new LogicException(sprintf('Unable to add test "%s" as extensions have already been initialized.', $name));
+        }
+
+        $this->staging->addTest($name, $test);
+    }
+
+    /**
+     * Gets the registered Tests.
+     *
+     * @return Twig_TestInterface[] An array of Twig_TestInterface instances
+     *
+     * @internal
+     */
+    public function getTests()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->tests;
+    }
+
+    /**
+     * Gets a test by name.
+     *
+     * @param string $name The test name
+     *
+     * @return Twig_Test|false A Twig_Test instance or false if the test does not exist
+     *
+     * @internal
+     */
+    public function getTest($name)
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        if (isset($this->tests[$name])) {
+            return $this->tests[$name];
+        }
+
+        return false;
+    }
+
+    /**
+     * Registers a Function.
+     *
+     * @param string|Twig_SimpleFunction                 $name     The function name or a Twig_SimpleFunction instance
+     * @param Twig_FunctionInterface|Twig_SimpleFunction $function A Twig_FunctionInterface instance or a Twig_SimpleFunction instance
+     */
+    public function addFunction($name, $function = null)
+    {
+        if (!$name instanceof Twig_SimpleFunction && !($function instanceof Twig_SimpleFunction || $function instanceof Twig_FunctionInterface)) {
+            throw new LogicException('A function must be an instance of Twig_FunctionInterface or Twig_SimpleFunction');
+        }
+
+        if ($name instanceof Twig_SimpleFunction) {
+            $function = $name;
+            $name = $function->getName();
+        } else {
+            @trigger_error(sprintf('Passing a name as a first argument to the %s method is deprecated since version 1.21. Pass an instance of "Twig_SimpleFunction" instead when defining function "%s".', __METHOD__, $name), E_USER_DEPRECATED);
+        }
+
+        if ($this->extensionInitialized) {
+            throw new LogicException(sprintf('Unable to add function "%s" as extensions have already been initialized.', $name));
+        }
+
+        $this->staging->addFunction($name, $function);
+    }
+
+    /**
+     * Get a function by name.
+     *
+     * Subclasses may override this method and load functions differently;
+     * so no list of functions is available.
+     *
+     * @param string $name function name
+     *
+     * @return Twig_Function|false A Twig_Function instance or false if the function does not exist
+     *
+     * @internal
+     */
+    public function getFunction($name)
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        if (isset($this->functions[$name])) {
+            return $this->functions[$name];
+        }
+
+        foreach ($this->functions as $pattern => $function) {
+            $pattern = str_replace('\\*', '(.*?)', preg_quote($pattern, '#'), $count);
+
+            if ($count) {
+                if (preg_match('#^'.$pattern.'$#', $name, $matches)) {
+                    array_shift($matches);
+                    $function->setArguments($matches);
+
+                    return $function;
+                }
+            }
+        }
+
+        foreach ($this->functionCallbacks as $callback) {
+            if (false !== $function = call_user_func($callback, $name)) {
+                return $function;
+            }
+        }
+
+        return false;
+    }
+
+    public function registerUndefinedFunctionCallback($callable)
+    {
+        $this->functionCallbacks[] = $callable;
+    }
+
+    /**
+     * Gets registered functions.
+     *
+     * Be warned that this method cannot return functions defined with registerUndefinedFunctionCallback.
+     *
+     * @return Twig_FunctionInterface[] An array of Twig_FunctionInterface instances
+     *
+     * @see registerUndefinedFunctionCallback
+     *
+     * @internal
+     */
+    public function getFunctions()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->functions;
+    }
+
+    /**
+     * Registers a Global.
+     *
+     * New globals can be added before compiling or rendering a template;
+     * but after, you can only update existing globals.
+     *
+     * @param string $name  The global name
+     * @param mixed  $value The global value
+     */
+    public function addGlobal($name, $value)
+    {
+        if ($this->extensionInitialized || $this->runtimeInitialized) {
+            if (null === $this->globals) {
+                $this->globals = $this->initGlobals();
+            }
+
+            if (!array_key_exists($name, $this->globals)) {
+                // The deprecation notice must be turned into the following exception in Twig 2.0
+                @trigger_error(sprintf('Registering global variable "%s" at runtime or when the extensions have already been initialized is deprecated since version 1.21.', $name), E_USER_DEPRECATED);
+                //throw new LogicException(sprintf('Unable to add global "%s" as the runtime or the extensions have already been initialized.', $name));
+            }
+        }
+
+        if ($this->extensionInitialized || $this->runtimeInitialized) {
+            // update the value
+            $this->globals[$name] = $value;
+        } else {
+            $this->staging->addGlobal($name, $value);
+        }
+    }
+
+    /**
+     * Gets the registered Globals.
+     *
+     * @return array An array of globals
+     *
+     * @internal
+     */
+    public function getGlobals()
+    {
+        if (!$this->runtimeInitialized && !$this->extensionInitialized) {
+            return $this->initGlobals();
+        }
+
+        if (null === $this->globals) {
+            $this->globals = $this->initGlobals();
+        }
+
+        return $this->globals;
+    }
+
+    /**
+     * Merges a context with the defined globals.
+     *
+     * @param array $context An array representing the context
+     *
+     * @return array The context merged with the globals
+     */
+    public function mergeGlobals(array $context)
+    {
+        // we don't use array_merge as the context being generally
+        // bigger than globals, this code is faster.
+        foreach ($this->getGlobals() as $key => $value) {
+            if (!array_key_exists($key, $context)) {
+                $context[$key] = $value;
+            }
+        }
+
+        return $context;
+    }
+
+    /**
+     * Gets the registered unary Operators.
+     *
+     * @return array An array of unary operators
+     *
+     * @internal
+     */
+    public function getUnaryOperators()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->unaryOperators;
+    }
+
+    /**
+     * Gets the registered binary Operators.
+     *
+     * @return array An array of binary operators
+     *
+     * @internal
+     */
+    public function getBinaryOperators()
+    {
+        if (!$this->extensionInitialized) {
+            $this->initExtensions();
+        }
+
+        return $this->binaryOperators;
+    }
+
+    /**
+     * @deprecated since 1.23 (to be removed in 2.0)
+     */
+    public function computeAlternatives($name, $items)
+    {
+        @trigger_error(sprintf('The %s method is deprecated since version 1.23 and will be removed in Twig 2.0.', __METHOD__), E_USER_DEPRECATED);
+
+        return Twig_Error_Syntax::computeAlternatives($name, $items);
+    }
+
+    /**
+     * @internal
+     */
+    protected function initGlobals()
+    {
+        $globals = array();
+        foreach ($this->extensions as $name => $extension) {
+            if (!$extension instanceof Twig_Extension_GlobalsInterface) {
+                $m = new ReflectionMethod($extension, 'getGlobals');
+
+                if ('Twig_Extension' !== $m->getDeclaringClass()->getName()) {
+                    @trigger_error(sprintf('Defining the getGlobals() method in the "%s" extension without explicitly implementing Twig_Extension_GlobalsInterface is deprecated since version 1.23.', $name), E_USER_DEPRECATED);
+                }
+            }
+
+            $extGlob = $extension->getGlobals();
+            if (!is_array($extGlob)) {
+                throw new UnexpectedValueException(sprintf('"%s::getGlobals()" must return an array of globals.', get_class($extension)));
+            }
+
+            $globals[] = $extGlob;
+        }
+
+        $globals[] = $this->staging->getGlobals();
+
+        return call_user_func_array('array_merge', $globals);
+    }
+
+    /**
+     * @internal
+     */
+    protected function initExtensions()
+    {
+        if ($this->extensionInitialized) {
+            return;
+        }
+
+        $this->extensionInitialized = true;
+        $this->parsers = new Twig_TokenParserBroker(array(), array(), false);
+        $this->filters = array();
+        $this->functions = array();
+        $this->tests = array();
+        $this->visitors = array();
+        $this->unaryOperators = array();
+        $this->binaryOperators = array();
+
+        foreach ($this->extensions as $extension) {
+            $this->initExtension($extension);
+        }
+        $this->initExtension($this->staging);
+    }
+
+    /**
+     * @internal
+     */
+    protected function initExtension(Twig_ExtensionInterface $extension)
+    {
+        // filters
+        foreach ($extension->getFilters() as $name => $filter) {
+            if ($filter instanceof Twig_SimpleFilter) {
+                $name = $filter->getName();
+            } else {
+                @trigger_error(sprintf('Using an instance of "%s" for filter "%s" is deprecated since version 1.21. Use Twig_SimpleFilter instead.', get_class($filter), $name), E_USER_DEPRECATED);
+            }
+
+            $this->filters[$name] = $filter;
+        }
+
+        // functions
+        foreach ($extension->getFunctions() as $name => $function) {
+            if ($function instanceof Twig_SimpleFunction) {
+                $name = $function->getName();
+            } else {
+                @trigger_error(sprintf('Using an instance of "%s" for function "%s" is deprecated since version 1.21. Use Twig_SimpleFunction instead.', get_class($function), $name), E_USER_DEPRECATED);
+            }
+
+            $this->functions[$name] = $function;
+        }
+
+        // tests
+        foreach ($extension->getTests() as $name => $test) {
+            if ($test instanceof Twig_SimpleTest) {
+                $name = $test->getName();
+            } else {
+                @trigger_error(sprintf('Using an instance of "%s" for test "%s" is deprecated since version 1.21. Use Twig_SimpleTest instead.', get_class($test), $name), E_USER_DEPRECATED);
+            }
+
+            $this->tests[$name] = $test;
+        }
+
+        // token parsers
+        foreach ($extension->getTokenParsers() as $parser) {
+            if ($parser instanceof Twig_TokenParserInterface) {
+                $this->parsers->addTokenParser($parser);
+            } elseif ($parser instanceof Twig_TokenParserBrokerInterface) {
+                @trigger_error('Registering a Twig_TokenParserBrokerInterface instance is deprecated since version 1.21.', E_USER_DEPRECATED);
+
+                $this->parsers->addTokenParserBroker($parser);
+            } else {
+                throw new LogicException('getTokenParsers() must return an array of Twig_TokenParserInterface or Twig_TokenParserBrokerInterface instances');
+            }
+        }
+
+        // node visitors
+        foreach ($extension->getNodeVisitors() as $visitor) {
+            $this->visitors[] = $visitor;
+        }
+
+        // operators
+        if ($operators = $extension->getOperators()) {
+            if (2 !== count($operators)) {
+                throw new InvalidArgumentException(sprintf('"%s::getOperators()" does not return a valid operators array.', get_class($extension)));
+            }
+
+            $this->unaryOperators = array_merge($this->unaryOperators, $operators[0]);
+            $this->binaryOperators = array_merge($this->binaryOperators, $operators[1]);
+        }
+    }
+
+    /**
+     * @deprecated since 1.22 (to be removed in 2.0)
+     */
+    protected function writeCacheFile($file, $content)
+    {
+        $this->cache->write($file, $content);
+    }
+}
diff --git a/public/system/library/template/Twig/Error.php b/public/system/library/template/Twig/Error.php
new file mode 100644
index 0000000..37c7435
--- /dev/null
+++ b/public/system/library/template/Twig/Error.php
@@ -0,0 +1,272 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig base exception.
+ *
+ * This exception class and its children must only be used when
+ * an error occurs during the loading of a template, when a syntax error
+ * is detected in a template, or when rendering a template. Other
+ * errors must use regular PHP exception classes (like when the template
+ * cache directory is not writable for instance).
+ *
+ * To help debugging template issues, this class tracks the original template
+ * name and line where the error occurred.
+ *
+ * Whenever possible, you must set these information (original template name
+ * and line number) yourself by passing them to the constructor. If some or all
+ * these information are not available from where you throw the exception, then
+ * this class will guess them automatically (when the line number is set to -1
+ * and/or the filename is set to null). As this is a costly operation, this
+ * can be disabled by passing false for both the filename and the line number
+ * when creating a new instance of this class.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Error extends Exception
+{
+    protected $lineno;
+    protected $filename;
+    protected $rawMessage;
+    protected $previous;
+
+    /**
+     * Constructor.
+     *
+     * Set both the line number and the filename to false to
+     * disable automatic guessing of the original template name
+     * and line number.
+     *
+     * Set the line number to -1 to enable its automatic guessing.
+     * Set the filename to null to enable its automatic guessing.
+     *
+     * By default, automatic guessing is enabled.
+     *
+     * @param string    $message  The error message
+     * @param int       $lineno   The template line where the error occurred
+     * @param string    $filename The template file name where the error occurred
+     * @param Exception $previous The previous exception
+     */
+    public function __construct($message, $lineno = -1, $filename = null, Exception $previous = null)
+    {
+        if (PHP_VERSION_ID < 50300) {
+            $this->previous = $previous;
+            parent::__construct('');
+        } else {
+            parent::__construct('', 0, $previous);
+        }
+
+        $this->lineno = $lineno;
+        $this->filename = $filename;
+
+        if (-1 === $this->lineno || null === $this->filename) {
+            $this->guessTemplateInfo();
+        }
+
+        $this->rawMessage = $message;
+
+        $this->updateRepr();
+    }
+
+    /**
+     * Gets the raw message.
+     *
+     * @return string The raw message
+     */
+    public function getRawMessage()
+    {
+        return $this->rawMessage;
+    }
+
+    /**
+     * Gets the filename where the error occurred.
+     *
+     * @return string The filename
+     */
+    public function getTemplateFile()
+    {
+        return $this->filename;
+    }
+
+    /**
+     * Sets the filename where the error occurred.
+     *
+     * @param string $filename The filename
+     */
+    public function setTemplateFile($filename)
+    {
+        $this->filename = $filename;
+
+        $this->updateRepr();
+    }
+
+    /**
+     * Gets the template line where the error occurred.
+     *
+     * @return int The template line
+     */
+    public function getTemplateLine()
+    {
+        return $this->lineno;
+    }
+
+    /**
+     * Sets the template line where the error occurred.
+     *
+     * @param int $lineno The template line
+     */
+    public function setTemplateLine($lineno)
+    {
+        $this->lineno = $lineno;
+
+        $this->updateRepr();
+    }
+
+    public function guess()
+    {
+        $this->guessTemplateInfo();
+        $this->updateRepr();
+    }
+
+    /**
+     * For PHP < 5.3.0, provides access to the getPrevious() method.
+     *
+     * @param string $method    The method name
+     * @param array  $arguments The parameters to be passed to the method
+     *
+     * @return Exception The previous exception or null
+     *
+     * @throws BadMethodCallException
+     */
+    public function __call($method, $arguments)
+    {
+        if ('getprevious' == strtolower($method)) {
+            return $this->previous;
+        }
+
+        throw new BadMethodCallException(sprintf('Method "Twig_Error::%s()" does not exist.', $method));
+    }
+
+    public function appendMessage($rawMessage)
+    {
+        $this->rawMessage .= $rawMessage;
+        $this->updateRepr();
+    }
+
+    /**
+     * @internal
+     */
+    protected function updateRepr()
+    {
+        $this->message = $this->rawMessage;
+
+        $dot = false;
+        if ('.' === substr($this->message, -1)) {
+            $this->message = substr($this->message, 0, -1);
+            $dot = true;
+        }
+
+        $questionMark = false;
+        if ('?' === substr($this->message, -1)) {
+            $this->message = substr($this->message, 0, -1);
+            $questionMark = true;
+        }
+
+        if ($this->filename) {
+            if (is_string($this->filename) || (is_object($this->filename) && method_exists($this->filename, '__toString'))) {
+                $filename = sprintf('"%s"', $this->filename);
+            } else {
+                $filename = json_encode($this->filename);
+            }
+            $this->message .= sprintf(' in %s', $filename);
+        }
+
+        if ($this->lineno && $this->lineno >= 0) {
+            $this->message .= sprintf(' at line %d', $this->lineno);
+        }
+
+        if ($dot) {
+            $this->message .= '.';
+        }
+
+        if ($questionMark) {
+            $this->message .= '?';
+        }
+    }
+
+    /**
+     * @internal
+     */
+    protected function guessTemplateInfo()
+    {
+        $template = null;
+        $templateClass = null;
+
+        if (PHP_VERSION_ID >= 50306) {
+            $backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS | DEBUG_BACKTRACE_PROVIDE_OBJECT);
+        } else {
+            $backtrace = debug_backtrace();
+        }
+
+        foreach ($backtrace as $trace) {
+            if (isset($trace['object']) && $trace['object'] instanceof Twig_Template && 'Twig_Template' !== get_class($trace['object'])) {
+                $currentClass = get_class($trace['object']);
+                $isEmbedContainer = 0 === strpos($templateClass, $currentClass);
+                if (null === $this->filename || ($this->filename == $trace['object']->getTemplateName() && !$isEmbedContainer)) {
+                    $template = $trace['object'];
+                    $templateClass = get_class($trace['object']);
+                }
+            }
+        }
+
+        // update template filename
+        if (null !== $template && null === $this->filename) {
+            $this->filename = $template->getTemplateName();
+        }
+
+        if (null === $template || $this->lineno > -1) {
+            return;
+        }
+
+        $r = new ReflectionObject($template);
+        $file = $r->getFileName();
+
+        // hhvm has a bug where eval'ed files comes out as the current directory
+        if (is_dir($file)) {
+            $file = '';
+        }
+
+        $exceptions = array($e = $this);
+        while (($e instanceof self || method_exists($e, 'getPrevious')) && $e = $e->getPrevious()) {
+            $exceptions[] = $e;
+        }
+
+        while ($e = array_pop($exceptions)) {
+            $traces = $e->getTrace();
+            array_unshift($traces, array('file' => $e->getFile(), 'line' => $e->getLine()));
+
+            while ($trace = array_shift($traces)) {
+                if (!isset($trace['file']) || !isset($trace['line']) || $file != $trace['file']) {
+                    continue;
+                }
+
+                foreach ($template->getDebugInfo() as $codeLine => $templateLine) {
+                    if ($codeLine <= $trace['line']) {
+                        // update template line
+                        $this->lineno = $templateLine;
+
+                        return;
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/Error/Loader.php b/public/system/library/template/Twig/Error/Loader.php
new file mode 100644
index 0000000..68efb57
--- /dev/null
+++ b/public/system/library/template/Twig/Error/Loader.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Exception thrown when an error occurs during template loading.
+ *
+ * Automatic template information guessing is always turned off as
+ * if a template cannot be loaded, there is nothing to guess.
+ * However, when a template is loaded from another one, then, we need
+ * to find the current context and this is automatically done by
+ * Twig_Template::displayWithErrorHandling().
+ *
+ * This strategy makes Twig_Environment::resolveTemplate() much faster.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Error_Loader extends Twig_Error
+{
+    public function __construct($message, $lineno = -1, $filename = null, Exception $previous = null)
+    {
+        parent::__construct($message, false, false, $previous);
+    }
+}
diff --git a/public/system/library/template/Twig/Error/Runtime.php b/public/system/library/template/Twig/Error/Runtime.php
new file mode 100644
index 0000000..8b6cedd
--- /dev/null
+++ b/public/system/library/template/Twig/Error/Runtime.php
@@ -0,0 +1,20 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Exception thrown when an error occurs at runtime.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Error_Runtime extends Twig_Error
+{
+}
diff --git a/public/system/library/template/Twig/Error/Syntax.php b/public/system/library/template/Twig/Error/Syntax.php
new file mode 100644
index 0000000..f73730a
--- /dev/null
+++ b/public/system/library/template/Twig/Error/Syntax.php
@@ -0,0 +1,53 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Exception thrown when a syntax error occurs during lexing or parsing of a template.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Error_Syntax extends Twig_Error
+{
+    /**
+     * Tweaks the error message to include suggestions.
+     *
+     * @param string $name  The original name of the item that does not exist
+     * @param array  $items An array of possible items
+     */
+    public function addSuggestions($name, array $items)
+    {
+        if (!$alternatives = self::computeAlternatives($name, $items)) {
+            return;
+        }
+
+        $this->appendMessage(sprintf(' Did you mean "%s"?', implode('", "', $alternatives)));
+    }
+
+    /**
+     * @internal
+     *
+     * To be merged with the addSuggestions() method in 2.0.
+     */
+    public static function computeAlternatives($name, $items)
+    {
+        $alternatives = array();
+        foreach ($items as $item) {
+            $lev = levenshtein($name, $item);
+            if ($lev <= strlen($name) / 3 || false !== strpos($item, $name)) {
+                $alternatives[$item] = $lev;
+            }
+        }
+        asort($alternatives);
+
+        return array_keys($alternatives);
+    }
+}
diff --git a/public/system/library/template/Twig/ExistsLoaderInterface.php b/public/system/library/template/Twig/ExistsLoaderInterface.php
new file mode 100644
index 0000000..b168c3c
--- /dev/null
+++ b/public/system/library/template/Twig/ExistsLoaderInterface.php
@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Adds an exists() method for loaders.
+ *
+ * @author Florin Patan <florinpatan@gmail.com>
+ *
+ * @deprecated since 1.12 (to be removed in 3.0)
+ */
+interface Twig_ExistsLoaderInterface
+{
+    /**
+     * Check if we have the source code of a template, given its name.
+     *
+     * @param string $name The name of the template to check if we can load
+     *
+     * @return bool If the template source code is handled by this loader or not
+     */
+    public function exists($name);
+}
diff --git a/public/system/library/template/Twig/ExpressionParser.php b/public/system/library/template/Twig/ExpressionParser.php
new file mode 100644
index 0000000..ec85a4d
--- /dev/null
+++ b/public/system/library/template/Twig/ExpressionParser.php
@@ -0,0 +1,648 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Parses expressions.
+ *
+ * This parser implements a "Precedence climbing" algorithm.
+ *
+ * @see http://www.engr.mun.ca/~theo/Misc/exp_parsing.htm
+ * @see http://en.wikipedia.org/wiki/Operator-precedence_parser
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_ExpressionParser
+{
+    const OPERATOR_LEFT = 1;
+    const OPERATOR_RIGHT = 2;
+
+    protected $parser;
+    protected $unaryOperators;
+    protected $binaryOperators;
+
+    public function __construct(Twig_Parser $parser, array $unaryOperators, array $binaryOperators)
+    {
+        $this->parser = $parser;
+        $this->unaryOperators = $unaryOperators;
+        $this->binaryOperators = $binaryOperators;
+    }
+
+    public function parseExpression($precedence = 0)
+    {
+        $expr = $this->getPrimary();
+        $token = $this->parser->getCurrentToken();
+        while ($this->isBinary($token) && $this->binaryOperators[$token->getValue()]['precedence'] >= $precedence) {
+            $op = $this->binaryOperators[$token->getValue()];
+            $this->parser->getStream()->next();
+
+            if (isset($op['callable'])) {
+                $expr = call_user_func($op['callable'], $this->parser, $expr);
+            } else {
+                $expr1 = $this->parseExpression(self::OPERATOR_LEFT === $op['associativity'] ? $op['precedence'] + 1 : $op['precedence']);
+                $class = $op['class'];
+                $expr = new $class($expr, $expr1, $token->getLine());
+            }
+
+            $token = $this->parser->getCurrentToken();
+        }
+
+        if (0 === $precedence) {
+            return $this->parseConditionalExpression($expr);
+        }
+
+        return $expr;
+    }
+
+    protected function getPrimary()
+    {
+        $token = $this->parser->getCurrentToken();
+
+        if ($this->isUnary($token)) {
+            $operator = $this->unaryOperators[$token->getValue()];
+            $this->parser->getStream()->next();
+            $expr = $this->parseExpression($operator['precedence']);
+            $class = $operator['class'];
+
+            return $this->parsePostfixExpression(new $class($expr, $token->getLine()));
+        } elseif ($token->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
+            $this->parser->getStream()->next();
+            $expr = $this->parseExpression();
+            $this->parser->getStream()->expect(Twig_Token::PUNCTUATION_TYPE, ')', 'An opened parenthesis is not properly closed');
+
+            return $this->parsePostfixExpression($expr);
+        }
+
+        return $this->parsePrimaryExpression();
+    }
+
+    protected function parseConditionalExpression($expr)
+    {
+        while ($this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, '?')) {
+            if (!$this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, ':')) {
+                $expr2 = $this->parseExpression();
+                if ($this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, ':')) {
+                    $expr3 = $this->parseExpression();
+                } else {
+                    $expr3 = new Twig_Node_Expression_Constant('', $this->parser->getCurrentToken()->getLine());
+                }
+            } else {
+                $expr2 = $expr;
+                $expr3 = $this->parseExpression();
+            }
+
+            $expr = new Twig_Node_Expression_Conditional($expr, $expr2, $expr3, $this->parser->getCurrentToken()->getLine());
+        }
+
+        return $expr;
+    }
+
+    protected function isUnary(Twig_Token $token)
+    {
+        return $token->test(Twig_Token::OPERATOR_TYPE) && isset($this->unaryOperators[$token->getValue()]);
+    }
+
+    protected function isBinary(Twig_Token $token)
+    {
+        return $token->test(Twig_Token::OPERATOR_TYPE) && isset($this->binaryOperators[$token->getValue()]);
+    }
+
+    public function parsePrimaryExpression()
+    {
+        $token = $this->parser->getCurrentToken();
+        switch ($token->getType()) {
+            case Twig_Token::NAME_TYPE:
+                $this->parser->getStream()->next();
+                switch ($token->getValue()) {
+                    case 'true':
+                    case 'TRUE':
+                        $node = new Twig_Node_Expression_Constant(true, $token->getLine());
+                        break;
+
+                    case 'false':
+                    case 'FALSE':
+                        $node = new Twig_Node_Expression_Constant(false, $token->getLine());
+                        break;
+
+                    case 'none':
+                    case 'NONE':
+                    case 'null':
+                    case 'NULL':
+                        $node = new Twig_Node_Expression_Constant(null, $token->getLine());
+                        break;
+
+                    default:
+                        if ('(' === $this->parser->getCurrentToken()->getValue()) {
+                            $node = $this->getFunctionNode($token->getValue(), $token->getLine());
+                        } else {
+                            $node = new Twig_Node_Expression_Name($token->getValue(), $token->getLine());
+                        }
+                }
+                break;
+
+            case Twig_Token::NUMBER_TYPE:
+                $this->parser->getStream()->next();
+                $node = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
+                break;
+
+            case Twig_Token::STRING_TYPE:
+            case Twig_Token::INTERPOLATION_START_TYPE:
+                $node = $this->parseStringExpression();
+                break;
+
+            case Twig_Token::OPERATOR_TYPE:
+                if (preg_match(Twig_Lexer::REGEX_NAME, $token->getValue(), $matches) && $matches[0] == $token->getValue()) {
+                    // in this context, string operators are variable names
+                    $this->parser->getStream()->next();
+                    $node = new Twig_Node_Expression_Name($token->getValue(), $token->getLine());
+                    break;
+                } elseif (isset($this->unaryOperators[$token->getValue()])) {
+                    $class = $this->unaryOperators[$token->getValue()]['class'];
+
+                    $ref = new ReflectionClass($class);
+                    $negClass = 'Twig_Node_Expression_Unary_Neg';
+                    $posClass = 'Twig_Node_Expression_Unary_Pos';
+                    if (!(in_array($ref->getName(), array($negClass, $posClass)) || $ref->isSubclassOf($negClass) || $ref->isSubclassOf($posClass))) {
+                        throw new Twig_Error_Syntax(sprintf('Unexpected unary operator "%s".', $token->getValue()), $token->getLine(), $this->parser->getFilename());
+                    }
+
+                    $this->parser->getStream()->next();
+                    $expr = $this->parsePrimaryExpression();
+
+                    $node = new $class($expr, $token->getLine());
+                    break;
+                }
+
+            default:
+                if ($token->test(Twig_Token::PUNCTUATION_TYPE, '[')) {
+                    $node = $this->parseArrayExpression();
+                } elseif ($token->test(Twig_Token::PUNCTUATION_TYPE, '{')) {
+                    $node = $this->parseHashExpression();
+                } else {
+                    throw new Twig_Error_Syntax(sprintf('Unexpected token "%s" of value "%s".', Twig_Token::typeToEnglish($token->getType()), $token->getValue()), $token->getLine(), $this->parser->getFilename());
+                }
+        }
+
+        return $this->parsePostfixExpression($node);
+    }
+
+    public function parseStringExpression()
+    {
+        $stream = $this->parser->getStream();
+
+        $nodes = array();
+        // a string cannot be followed by another string in a single expression
+        $nextCanBeString = true;
+        while (true) {
+            if ($nextCanBeString && $token = $stream->nextIf(Twig_Token::STRING_TYPE)) {
+                $nodes[] = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
+                $nextCanBeString = false;
+            } elseif ($stream->nextIf(Twig_Token::INTERPOLATION_START_TYPE)) {
+                $nodes[] = $this->parseExpression();
+                $stream->expect(Twig_Token::INTERPOLATION_END_TYPE);
+                $nextCanBeString = true;
+            } else {
+                break;
+            }
+        }
+
+        $expr = array_shift($nodes);
+        foreach ($nodes as $node) {
+            $expr = new Twig_Node_Expression_Binary_Concat($expr, $node, $node->getLine());
+        }
+
+        return $expr;
+    }
+
+    public function parseArrayExpression()
+    {
+        $stream = $this->parser->getStream();
+        $stream->expect(Twig_Token::PUNCTUATION_TYPE, '[', 'An array element was expected');
+
+        $node = new Twig_Node_Expression_Array(array(), $stream->getCurrent()->getLine());
+        $first = true;
+        while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
+            if (!$first) {
+                $stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'An array element must be followed by a comma');
+
+                // trailing ,?
+                if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
+                    break;
+                }
+            }
+            $first = false;
+
+            $node->addElement($this->parseExpression());
+        }
+        $stream->expect(Twig_Token::PUNCTUATION_TYPE, ']', 'An opened array is not properly closed');
+
+        return $node;
+    }
+
+    public function parseHashExpression()
+    {
+        $stream = $this->parser->getStream();
+        $stream->expect(Twig_Token::PUNCTUATION_TYPE, '{', 'A hash element was expected');
+
+        $node = new Twig_Node_Expression_Array(array(), $stream->getCurrent()->getLine());
+        $first = true;
+        while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, '}')) {
+            if (!$first) {
+                $stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'A hash value must be followed by a comma');
+
+                // trailing ,?
+                if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '}')) {
+                    break;
+                }
+            }
+            $first = false;
+
+            // a hash key can be:
+            //
+            //  * a number -- 12
+            //  * a string -- 'a'
+            //  * a name, which is equivalent to a string -- a
+            //  * an expression, which must be enclosed in parentheses -- (1 + 2)
+            if (($token = $stream->nextIf(Twig_Token::STRING_TYPE)) || ($token = $stream->nextIf(Twig_Token::NAME_TYPE)) || $token = $stream->nextIf(Twig_Token::NUMBER_TYPE)) {
+                $key = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
+            } elseif ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
+                $key = $this->parseExpression();
+            } else {
+                $current = $stream->getCurrent();
+
+                throw new Twig_Error_Syntax(sprintf('A hash key must be a quoted string, a number, a name, or an expression enclosed in parentheses (unexpected token "%s" of value "%s".', Twig_Token::typeToEnglish($current->getType()), $current->getValue()), $current->getLine(), $this->parser->getFilename());
+            }
+
+            $stream->expect(Twig_Token::PUNCTUATION_TYPE, ':', 'A hash key must be followed by a colon (:)');
+            $value = $this->parseExpression();
+
+            $node->addElement($value, $key);
+        }
+        $stream->expect(Twig_Token::PUNCTUATION_TYPE, '}', 'An opened hash is not properly closed');
+
+        return $node;
+    }
+
+    public function parsePostfixExpression($node)
+    {
+        while (true) {
+            $token = $this->parser->getCurrentToken();
+            if ($token->getType() == Twig_Token::PUNCTUATION_TYPE) {
+                if ('.' == $token->getValue() || '[' == $token->getValue()) {
+                    $node = $this->parseSubscriptExpression($node);
+                } elseif ('|' == $token->getValue()) {
+                    $node = $this->parseFilterExpression($node);
+                } else {
+                    break;
+                }
+            } else {
+                break;
+            }
+        }
+
+        return $node;
+    }
+
+    public function getFunctionNode($name, $line)
+    {
+        switch ($name) {
+            case 'parent':
+                $this->parseArguments();
+                if (!count($this->parser->getBlockStack())) {
+                    throw new Twig_Error_Syntax('Calling "parent" outside a block is forbidden.', $line, $this->parser->getFilename());
+                }
+
+                if (!$this->parser->getParent() && !$this->parser->hasTraits()) {
+                    throw new Twig_Error_Syntax('Calling "parent" on a template that does not extend nor "use" another template is forbidden.', $line, $this->parser->getFilename());
+                }
+
+                return new Twig_Node_Expression_Parent($this->parser->peekBlockStack(), $line);
+            case 'block':
+                return new Twig_Node_Expression_BlockReference($this->parseArguments()->getNode(0), false, $line);
+            case 'attribute':
+                $args = $this->parseArguments();
+                if (count($args) < 2) {
+                    throw new Twig_Error_Syntax('The "attribute" function takes at least two arguments (the variable and the attributes).', $line, $this->parser->getFilename());
+                }
+
+                return new Twig_Node_Expression_GetAttr($args->getNode(0), $args->getNode(1), count($args) > 2 ? $args->getNode(2) : null, Twig_Template::ANY_CALL, $line);
+            default:
+                if (null !== $alias = $this->parser->getImportedSymbol('function', $name)) {
+                    $arguments = new Twig_Node_Expression_Array(array(), $line);
+                    foreach ($this->parseArguments() as $n) {
+                        $arguments->addElement($n);
+                    }
+
+                    $node = new Twig_Node_Expression_MethodCall($alias['node'], $alias['name'], $arguments, $line);
+                    $node->setAttribute('safe', true);
+
+                    return $node;
+                }
+
+                $args = $this->parseArguments(true);
+                $class = $this->getFunctionNodeClass($name, $line);
+
+                return new $class($name, $args, $line);
+        }
+    }
+
+    public function parseSubscriptExpression($node)
+    {
+        $stream = $this->parser->getStream();
+        $token = $stream->next();
+        $lineno = $token->getLine();
+        $arguments = new Twig_Node_Expression_Array(array(), $lineno);
+        $type = Twig_Template::ANY_CALL;
+        if ($token->getValue() == '.') {
+            $token = $stream->next();
+            if (
+                $token->getType() == Twig_Token::NAME_TYPE
+                ||
+                $token->getType() == Twig_Token::NUMBER_TYPE
+                ||
+                ($token->getType() == Twig_Token::OPERATOR_TYPE && preg_match(Twig_Lexer::REGEX_NAME, $token->getValue()))
+            ) {
+                $arg = new Twig_Node_Expression_Constant($token->getValue(), $lineno);
+
+                if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
+                    $type = Twig_Template::METHOD_CALL;
+                    foreach ($this->parseArguments() as $n) {
+                        $arguments->addElement($n);
+                    }
+                }
+            } else {
+                throw new Twig_Error_Syntax('Expected name or number', $lineno, $this->parser->getFilename());
+            }
+
+            if ($node instanceof Twig_Node_Expression_Name && null !== $this->parser->getImportedSymbol('template', $node->getAttribute('name'))) {
+                if (!$arg instanceof Twig_Node_Expression_Constant) {
+                    throw new Twig_Error_Syntax(sprintf('Dynamic macro names are not supported (called on "%s").', $node->getAttribute('name')), $token->getLine(), $this->parser->getFilename());
+                }
+
+                $name = $arg->getAttribute('value');
+
+                if ($this->parser->isReservedMacroName($name)) {
+                    throw new Twig_Error_Syntax(sprintf('"%s" cannot be called as macro as it is a reserved keyword.', $name), $token->getLine(), $this->parser->getFilename());
+                }
+
+                $node = new Twig_Node_Expression_MethodCall($node, 'get'.$name, $arguments, $lineno);
+                $node->setAttribute('safe', true);
+
+                return $node;
+            }
+        } else {
+            $type = Twig_Template::ARRAY_CALL;
+
+            // slice?
+            $slice = false;
+            if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ':')) {
+                $slice = true;
+                $arg = new Twig_Node_Expression_Constant(0, $token->getLine());
+            } else {
+                $arg = $this->parseExpression();
+            }
+
+            if ($stream->nextIf(Twig_Token::PUNCTUATION_TYPE, ':')) {
+                $slice = true;
+            }
+
+            if ($slice) {
+                if ($stream->test(Twig_Token::PUNCTUATION_TYPE, ']')) {
+                    $length = new Twig_Node_Expression_Constant(null, $token->getLine());
+                } else {
+                    $length = $this->parseExpression();
+                }
+
+                $class = $this->getFilterNodeClass('slice', $token->getLine());
+                $arguments = new Twig_Node(array($arg, $length));
+                $filter = new $class($node, new Twig_Node_Expression_Constant('slice', $token->getLine()), $arguments, $token->getLine());
+
+                $stream->expect(Twig_Token::PUNCTUATION_TYPE, ']');
+
+                return $filter;
+            }
+
+            $stream->expect(Twig_Token::PUNCTUATION_TYPE, ']');
+        }
+
+        return new Twig_Node_Expression_GetAttr($node, $arg, $arguments, $type, $lineno);
+    }
+
+    public function parseFilterExpression($node)
+    {
+        $this->parser->getStream()->next();
+
+        return $this->parseFilterExpressionRaw($node);
+    }
+
+    public function parseFilterExpressionRaw($node, $tag = null)
+    {
+        while (true) {
+            $token = $this->parser->getStream()->expect(Twig_Token::NAME_TYPE);
+
+            $name = new Twig_Node_Expression_Constant($token->getValue(), $token->getLine());
+            if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
+                $arguments = new Twig_Node();
+            } else {
+                $arguments = $this->parseArguments(true);
+            }
+
+            $class = $this->getFilterNodeClass($name->getAttribute('value'), $token->getLine());
+
+            $node = new $class($node, $name, $arguments, $token->getLine(), $tag);
+
+            if (!$this->parser->getStream()->test(Twig_Token::PUNCTUATION_TYPE, '|')) {
+                break;
+            }
+
+            $this->parser->getStream()->next();
+        }
+
+        return $node;
+    }
+
+    /**
+     * Parses arguments.
+     *
+     * @param bool $namedArguments Whether to allow named arguments or not
+     * @param bool $definition     Whether we are parsing arguments for a function definition
+     *
+     * @return Twig_Node
+     *
+     * @throws Twig_Error_Syntax
+     */
+    public function parseArguments($namedArguments = false, $definition = false)
+    {
+        $args = array();
+        $stream = $this->parser->getStream();
+
+        $stream->expect(Twig_Token::PUNCTUATION_TYPE, '(', 'A list of arguments must begin with an opening parenthesis');
+        while (!$stream->test(Twig_Token::PUNCTUATION_TYPE, ')')) {
+            if (!empty($args)) {
+                $stream->expect(Twig_Token::PUNCTUATION_TYPE, ',', 'Arguments must be separated by a comma');
+            }
+
+            if ($definition) {
+                $token = $stream->expect(Twig_Token::NAME_TYPE, null, 'An argument must be a name');
+                $value = new Twig_Node_Expression_Name($token->getValue(), $this->parser->getCurrentToken()->getLine());
+            } else {
+                $value = $this->parseExpression();
+            }
+
+            $name = null;
+            if ($namedArguments && $token = $stream->nextIf(Twig_Token::OPERATOR_TYPE, '=')) {
+                if (!$value instanceof Twig_Node_Expression_Name) {
+                    throw new Twig_Error_Syntax(sprintf('A parameter name must be a string, "%s" given.', get_class($value)), $token->getLine(), $this->parser->getFilename());
+                }
+                $name = $value->getAttribute('name');
+
+                if ($definition) {
+                    $value = $this->parsePrimaryExpression();
+
+                    if (!$this->checkConstantExpression($value)) {
+                        throw new Twig_Error_Syntax(sprintf('A default value for an argument must be a constant (a boolean, a string, a number, or an array).'), $token->getLine(), $this->parser->getFilename());
+                    }
+                } else {
+                    $value = $this->parseExpression();
+                }
+            }
+
+            if ($definition) {
+                if (null === $name) {
+                    $name = $value->getAttribute('name');
+                    $value = new Twig_Node_Expression_Constant(null, $this->parser->getCurrentToken()->getLine());
+                }
+                $args[$name] = $value;
+            } else {
+                if (null === $name) {
+                    $args[] = $value;
+                } else {
+                    $args[$name] = $value;
+                }
+            }
+        }
+        $stream->expect(Twig_Token::PUNCTUATION_TYPE, ')', 'A list of arguments must be closed by a parenthesis');
+
+        return new Twig_Node($args);
+    }
+
+    public function parseAssignmentExpression()
+    {
+        $targets = array();
+        while (true) {
+            $token = $this->parser->getStream()->expect(Twig_Token::NAME_TYPE, null, 'Only variables can be assigned to');
+            $value = $token->getValue();
+            if (in_array(strtolower($value), array('true', 'false', 'none', 'null'))) {
+                throw new Twig_Error_Syntax(sprintf('You cannot assign a value to "%s"', $value), $token->getLine(), $this->parser->getFilename());
+            }
+            $targets[] = new Twig_Node_Expression_AssignName($value, $token->getLine());
+
+            if (!$this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, ',')) {
+                break;
+            }
+        }
+
+        return new Twig_Node($targets);
+    }
+
+    public function parseMultitargetExpression()
+    {
+        $targets = array();
+        while (true) {
+            $targets[] = $this->parseExpression();
+            if (!$this->parser->getStream()->nextIf(Twig_Token::PUNCTUATION_TYPE, ',')) {
+                break;
+            }
+        }
+
+        return new Twig_Node($targets);
+    }
+
+    protected function getFunctionNodeClass($name, $line)
+    {
+        $env = $this->parser->getEnvironment();
+
+        if (false === $function = $env->getFunction($name)) {
+            $e = new Twig_Error_Syntax(sprintf('Unknown "%s" function.', $name), $line, $this->parser->getFilename());
+            $e->addSuggestions($name, array_keys($env->getFunctions()));
+
+            throw $e;
+        }
+
+        if ($function instanceof Twig_SimpleFunction && $function->isDeprecated()) {
+            $message = sprintf('Twig Function "%s" is deprecated', $function->getName());
+            if (!is_bool($function->getDeprecatedVersion())) {
+                $message .= sprintf(' since version %s', $function->getDeprecatedVersion());
+            }
+            if ($function->getAlternative()) {
+                $message .= sprintf('. Use "%s" instead', $function->getAlternative());
+            }
+            $message .= sprintf(' in %s at line %d.', $this->parser->getFilename(), $line);
+
+            @trigger_error($message, E_USER_DEPRECATED);
+        }
+
+        if ($function instanceof Twig_SimpleFunction) {
+            return $function->getNodeClass();
+        }
+
+        return $function instanceof Twig_Function_Node ? $function->getClass() : 'Twig_Node_Expression_Function';
+    }
+
+    protected function getFilterNodeClass($name, $line)
+    {
+        $env = $this->parser->getEnvironment();
+
+        if (false === $filter = $env->getFilter($name)) {
+            $e = new Twig_Error_Syntax(sprintf('Unknown "%s" filter.', $name), $line, $this->parser->getFilename());
+            $e->addSuggestions($name, array_keys($env->getFilters()));
+
+            throw $e;
+        }
+
+        if ($filter instanceof Twig_SimpleFilter && $filter->isDeprecated()) {
+            $message = sprintf('Twig Filter "%s" is deprecated', $filter->getName());
+            if (!is_bool($filter->getDeprecatedVersion())) {
+                $message .= sprintf(' since version %s', $filter->getDeprecatedVersion());
+            }
+            if ($filter->getAlternative()) {
+                $message .= sprintf('. Use "%s" instead', $filter->getAlternative());
+            }
+            $message .= sprintf(' in %s at line %d.', $this->parser->getFilename(), $line);
+
+            @trigger_error($message, E_USER_DEPRECATED);
+        }
+
+        if ($filter instanceof Twig_SimpleFilter) {
+            return $filter->getNodeClass();
+        }
+
+        return $filter instanceof Twig_Filter_Node ? $filter->getClass() : 'Twig_Node_Expression_Filter';
+    }
+
+    // checks that the node only contains "constant" elements
+    protected function checkConstantExpression(Twig_NodeInterface $node)
+    {
+        if (!($node instanceof Twig_Node_Expression_Constant || $node instanceof Twig_Node_Expression_Array
+            || $node instanceof Twig_Node_Expression_Unary_Neg || $node instanceof Twig_Node_Expression_Unary_Pos
+        )) {
+            return false;
+        }
+
+        foreach ($node as $n) {
+            if (!$this->checkConstantExpression($n)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+}
diff --git a/public/system/library/template/Twig/Extension.php b/public/system/library/template/Twig/Extension.php
new file mode 100644
index 0000000..cb03b3d
--- /dev/null
+++ b/public/system/library/template/Twig/Extension.php
@@ -0,0 +1,79 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+abstract class Twig_Extension implements Twig_ExtensionInterface
+{
+    /**
+     * {@inheritdoc}
+     *
+     * @deprecated since 1.23 (to be removed in 2.0), implement Twig_Extension_InitRuntimeInterface instead
+     */
+    public function initRuntime(Twig_Environment $environment)
+    {
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getTokenParsers()
+    {
+        return array();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getNodeVisitors()
+    {
+        return array();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getFilters()
+    {
+        return array();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getTests()
+    {
+        return array();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getFunctions()
+    {
+        return array();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getOperators()
+    {
+        return array();
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @deprecated since 1.23 (to be removed in 2.0), implement Twig_Extension_GlobalsInterface instead
+     */
+    public function getGlobals()
+    {
+        return array();
+    }
+}
diff --git a/public/system/library/template/Twig/Extension/Core.php b/public/system/library/template/Twig/Extension/Core.php
new file mode 100644
index 0000000..79ef521
--- /dev/null
+++ b/public/system/library/template/Twig/Extension/Core.php
@@ -0,0 +1,1548 @@
+<?php
+
+if (!defined('ENT_SUBSTITUTE')) {
+    // use 0 as hhvm does not support several flags yet
+    define('ENT_SUBSTITUTE', 0);
+}
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_Core extends Twig_Extension
+{
+    protected $dateFormats = array('F j, Y H:i', '%d days');
+    protected $numberFormat = array(0, '.', ',');
+    protected $timezone = null;
+    protected $escapers = array();
+
+    /**
+     * Defines a new escaper to be used via the escape filter.
+     *
+     * @param string   $strategy The strategy name that should be used as a strategy in the escape call
+     * @param callable $callable A valid PHP callable
+     */
+    public function setEscaper($strategy, $callable)
+    {
+        $this->escapers[$strategy] = $callable;
+    }
+
+    /**
+     * Gets all defined escapers.
+     *
+     * @return array An array of escapers
+     */
+    public function getEscapers()
+    {
+        return $this->escapers;
+    }
+
+    /**
+     * Sets the default format to be used by the date filter.
+     *
+     * @param string $format             The default date format string
+     * @param string $dateIntervalFormat The default date interval format string
+     */
+    public function setDateFormat($format = null, $dateIntervalFormat = null)
+    {
+        if (null !== $format) {
+            $this->dateFormats[0] = $format;
+        }
+
+        if (null !== $dateIntervalFormat) {
+            $this->dateFormats[1] = $dateIntervalFormat;
+        }
+    }
+
+    /**
+     * Gets the default format to be used by the date filter.
+     *
+     * @return array The default date format string and the default date interval format string
+     */
+    public function getDateFormat()
+    {
+        return $this->dateFormats;
+    }
+
+    /**
+     * Sets the default timezone to be used by the date filter.
+     *
+     * @param DateTimeZone|string $timezone The default timezone string or a DateTimeZone object
+     */
+    public function setTimezone($timezone)
+    {
+        $this->timezone = $timezone instanceof DateTimeZone ? $timezone : new DateTimeZone($timezone);
+    }
+
+    /**
+     * Gets the default timezone to be used by the date filter.
+     *
+     * @return DateTimeZone The default timezone currently in use
+     */
+    public function getTimezone()
+    {
+        if (null === $this->timezone) {
+            $this->timezone = new DateTimeZone(date_default_timezone_get());
+        }
+
+        return $this->timezone;
+    }
+
+    /**
+     * Sets the default format to be used by the number_format filter.
+     *
+     * @param int    $decimal      The number of decimal places to use.
+     * @param string $decimalPoint The character(s) to use for the decimal point.
+     * @param string $thousandSep  The character(s) to use for the thousands separator.
+     */
+    public function setNumberFormat($decimal, $decimalPoint, $thousandSep)
+    {
+        $this->numberFormat = array($decimal, $decimalPoint, $thousandSep);
+    }
+
+    /**
+     * Get the default format used by the number_format filter.
+     *
+     * @return array The arguments for number_format()
+     */
+    public function getNumberFormat()
+    {
+        return $this->numberFormat;
+    }
+
+    public function getTokenParsers()
+    {
+        return array(
+            new Twig_TokenParser_For(),
+            new Twig_TokenParser_If(),
+            new Twig_TokenParser_Extends(),
+            new Twig_TokenParser_Include(),
+            new Twig_TokenParser_Block(),
+            new Twig_TokenParser_Use(),
+            new Twig_TokenParser_Filter(),
+            new Twig_TokenParser_Macro(),
+            new Twig_TokenParser_Import(),
+            new Twig_TokenParser_From(),
+            new Twig_TokenParser_Set(),
+            new Twig_TokenParser_Spaceless(),
+            new Twig_TokenParser_Flush(),
+            new Twig_TokenParser_Do(),
+            new Twig_TokenParser_Embed(),
+        );
+    }
+
+    public function getFilters()
+    {
+        $filters = array(
+            // formatting filters
+            new Twig_SimpleFilter('date', 'twig_date_format_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('date_modify', 'twig_date_modify_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('format', 'sprintf'),
+            new Twig_SimpleFilter('replace', 'twig_replace_filter'),
+            new Twig_SimpleFilter('number_format', 'twig_number_format_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('abs', 'abs'),
+            new Twig_SimpleFilter('round', 'twig_round'),
+
+            // encoding
+            new Twig_SimpleFilter('url_encode', 'twig_urlencode_filter'),
+            new Twig_SimpleFilter('json_encode', 'twig_jsonencode_filter'),
+            new Twig_SimpleFilter('convert_encoding', 'twig_convert_encoding'),
+
+            // string filters
+            new Twig_SimpleFilter('title', 'twig_title_string_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('capitalize', 'twig_capitalize_string_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('upper', 'strtoupper'),
+            new Twig_SimpleFilter('lower', 'strtolower'),
+            new Twig_SimpleFilter('striptags', 'strip_tags'),
+            new Twig_SimpleFilter('trim', 'trim'),
+            new Twig_SimpleFilter('nl2br', 'nl2br', array('pre_escape' => 'html', 'is_safe' => array('html'))),
+
+            // array helpers
+            new Twig_SimpleFilter('join', 'twig_join_filter'),
+            new Twig_SimpleFilter('split', 'twig_split_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('sort', 'twig_sort_filter'),
+            new Twig_SimpleFilter('merge', 'twig_array_merge'),
+            new Twig_SimpleFilter('batch', 'twig_array_batch'),
+
+            // string/array filters
+            new Twig_SimpleFilter('reverse', 'twig_reverse_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('length', 'twig_length_filter', array('needs_environment' => true)),
+            new Twig_SimpleFilter('slice', 'twig_slice', array('needs_environment' => true)),
+            new Twig_SimpleFilter('first', 'twig_first', array('needs_environment' => true)),
+            new Twig_SimpleFilter('last', 'twig_last', array('needs_environment' => true)),
+
+            // iteration and runtime
+            new Twig_SimpleFilter('default', '_twig_default_filter', array('node_class' => 'Twig_Node_Expression_Filter_Default')),
+            new Twig_SimpleFilter('keys', 'twig_get_array_keys_filter'),
+
+            // escaping
+            new Twig_SimpleFilter('escape', 'twig_escape_filter', array('needs_environment' => true, 'is_safe_callback' => 'twig_escape_filter_is_safe')),
+            new Twig_SimpleFilter('e', 'twig_escape_filter', array('needs_environment' => true, 'is_safe_callback' => 'twig_escape_filter_is_safe')),
+        );
+
+        if (function_exists('mb_get_info')) {
+            $filters[] = new Twig_SimpleFilter('upper', 'twig_upper_filter', array('needs_environment' => true));
+            $filters[] = new Twig_SimpleFilter('lower', 'twig_lower_filter', array('needs_environment' => true));
+        }
+
+        return $filters;
+    }
+
+    public function getFunctions()
+    {
+        return array(
+            new Twig_SimpleFunction('max', 'max'),
+            new Twig_SimpleFunction('min', 'min'),
+            new Twig_SimpleFunction('range', 'range'),
+            new Twig_SimpleFunction('constant', 'twig_constant'),
+            new Twig_SimpleFunction('cycle', 'twig_cycle'),
+            new Twig_SimpleFunction('random', 'twig_random', array('needs_environment' => true)),
+            new Twig_SimpleFunction('date', 'twig_date_converter', array('needs_environment' => true)),
+            new Twig_SimpleFunction('include', 'twig_include', array('needs_environment' => true, 'needs_context' => true, 'is_safe' => array('all'))),
+            new Twig_SimpleFunction('source', 'twig_source', array('needs_environment' => true, 'is_safe' => array('all'))),
+        );
+    }
+
+    public function getTests()
+    {
+        return array(
+            new Twig_SimpleTest('even', null, array('node_class' => 'Twig_Node_Expression_Test_Even')),
+            new Twig_SimpleTest('odd', null, array('node_class' => 'Twig_Node_Expression_Test_Odd')),
+            new Twig_SimpleTest('defined', null, array('node_class' => 'Twig_Node_Expression_Test_Defined')),
+            new Twig_SimpleTest('sameas', null, array('node_class' => 'Twig_Node_Expression_Test_Sameas', 'deprecated' => '1.21', 'alternative' => 'same as')),
+            new Twig_SimpleTest('same as', null, array('node_class' => 'Twig_Node_Expression_Test_Sameas')),
+            new Twig_SimpleTest('none', null, array('node_class' => 'Twig_Node_Expression_Test_Null')),
+            new Twig_SimpleTest('null', null, array('node_class' => 'Twig_Node_Expression_Test_Null')),
+            new Twig_SimpleTest('divisibleby', null, array('node_class' => 'Twig_Node_Expression_Test_Divisibleby', 'deprecated' => '1.21', 'alternative' => 'divisible by')),
+            new Twig_SimpleTest('divisible by', null, array('node_class' => 'Twig_Node_Expression_Test_Divisibleby')),
+            new Twig_SimpleTest('constant', null, array('node_class' => 'Twig_Node_Expression_Test_Constant')),
+            new Twig_SimpleTest('empty', 'twig_test_empty'),
+            new Twig_SimpleTest('iterable', 'twig_test_iterable'),
+        );
+    }
+
+    public function getOperators()
+    {
+        return array(
+            array(
+                'not' => array('precedence' => 50, 'class' => 'Twig_Node_Expression_Unary_Not'),
+                '-' => array('precedence' => 500, 'class' => 'Twig_Node_Expression_Unary_Neg'),
+                '+' => array('precedence' => 500, 'class' => 'Twig_Node_Expression_Unary_Pos'),
+            ),
+            array(
+                'or' => array('precedence' => 10, 'class' => 'Twig_Node_Expression_Binary_Or', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'and' => array('precedence' => 15, 'class' => 'Twig_Node_Expression_Binary_And', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'b-or' => array('precedence' => 16, 'class' => 'Twig_Node_Expression_Binary_BitwiseOr', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'b-xor' => array('precedence' => 17, 'class' => 'Twig_Node_Expression_Binary_BitwiseXor', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'b-and' => array('precedence' => 18, 'class' => 'Twig_Node_Expression_Binary_BitwiseAnd', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '==' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Equal', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '!=' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_NotEqual', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '<' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Less', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '>' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Greater', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '>=' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_GreaterEqual', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '<=' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_LessEqual', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'not in' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_NotIn', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'in' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_In', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'matches' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_Matches', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'starts with' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_StartsWith', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'ends with' => array('precedence' => 20, 'class' => 'Twig_Node_Expression_Binary_EndsWith', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '..' => array('precedence' => 25, 'class' => 'Twig_Node_Expression_Binary_Range', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '+' => array('precedence' => 30, 'class' => 'Twig_Node_Expression_Binary_Add', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '-' => array('precedence' => 30, 'class' => 'Twig_Node_Expression_Binary_Sub', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '~' => array('precedence' => 40, 'class' => 'Twig_Node_Expression_Binary_Concat', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '*' => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Mul', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '/' => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Div', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '//' => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_FloorDiv', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '%' => array('precedence' => 60, 'class' => 'Twig_Node_Expression_Binary_Mod', 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'is' => array('precedence' => 100, 'callable' => array($this, 'parseTestExpression'), 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                'is not' => array('precedence' => 100, 'callable' => array($this, 'parseNotTestExpression'), 'associativity' => Twig_ExpressionParser::OPERATOR_LEFT),
+                '**' => array('precedence' => 200, 'class' => 'Twig_Node_Expression_Binary_Power', 'associativity' => Twig_ExpressionParser::OPERATOR_RIGHT),
+                '??' => array('precedence' => 300, 'class' => 'Twig_Node_Expression_NullCoalesce', 'associativity' => Twig_ExpressionParser::OPERATOR_RIGHT),
+            ),
+        );
+    }
+
+    public function parseNotTestExpression(Twig_Parser $parser, Twig_NodeInterface $node)
+    {
+        return new Twig_Node_Expression_Unary_Not($this->parseTestExpression($parser, $node), $parser->getCurrentToken()->getLine());
+    }
+
+    public function parseTestExpression(Twig_Parser $parser, Twig_NodeInterface $node)
+    {
+        $stream = $parser->getStream();
+        list($name, $test) = $this->getTest($parser, $node->getLine());
+
+        if ($test instanceof Twig_SimpleTest && $test->isDeprecated()) {
+            $message = sprintf('Twig Test "%s" is deprecated', $name);
+            if (!is_bool($test->getDeprecatedVersion())) {
+                $message .= sprintf(' since version %s', $test->getDeprecatedVersion());
+            }
+            if ($test->getAlternative()) {
+                $message .= sprintf('. Use "%s" instead', $test->getAlternative());
+            }
+            $message .= sprintf(' in %s at line %d.', $stream->getFilename(), $stream->getCurrent()->getLine());
+
+            @trigger_error($message, E_USER_DEPRECATED);
+        }
+
+        $class = $this->getTestNodeClass($parser, $test);
+        $arguments = null;
+        if ($stream->test(Twig_Token::PUNCTUATION_TYPE, '(')) {
+            $arguments = $parser->getExpressionParser()->parseArguments(true);
+        }
+
+        return new $class($node, $name, $arguments, $parser->getCurrentToken()->getLine());
+    }
+
+    protected function getTest(Twig_Parser $parser, $line)
+    {
+        $stream = $parser->getStream();
+        $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+        $env = $parser->getEnvironment();
+
+        if ($test = $env->getTest($name)) {
+            return array($name, $test);
+        }
+
+        if ($stream->test(Twig_Token::NAME_TYPE)) {
+            // try 2-words tests
+            $name = $name.' '.$parser->getCurrentToken()->getValue();
+
+            if ($test = $env->getTest($name)) {
+                $parser->getStream()->next();
+
+                return array($name, $test);
+            }
+        }
+
+        $e = new Twig_Error_Syntax(sprintf('Unknown "%s" test.', $name), $line, $parser->getFilename());
+        $e->addSuggestions($name, array_keys($env->getTests()));
+
+        throw $e;
+    }
+
+    protected function getTestNodeClass(Twig_Parser $parser, $test)
+    {
+        if ($test instanceof Twig_SimpleTest) {
+            return $test->getNodeClass();
+        }
+
+        return $test instanceof Twig_Test_Node ? $test->getClass() : 'Twig_Node_Expression_Test';
+    }
+
+    public function getName()
+    {
+        return 'core';
+    }
+}
+
+/**
+ * Cycles over a value.
+ *
+ * @param ArrayAccess|array $values   An array or an ArrayAccess instance
+ * @param int               $position The cycle position
+ *
+ * @return string The next value in the cycle
+ */
+function twig_cycle($values, $position)
+{
+    if (!is_array($values) && !$values instanceof ArrayAccess) {
+        return $values;
+    }
+
+    return $values[$position % count($values)];
+}
+
+/**
+ * Returns a random value depending on the supplied parameter type:
+ * - a random item from a Traversable or array
+ * - a random character from a string
+ * - a random integer between 0 and the integer parameter.
+ *
+ * @param Twig_Environment             $env    A Twig_Environment instance
+ * @param Traversable|array|int|string $values The values to pick a random item from
+ *
+ * @throws Twig_Error_Runtime When $values is an empty array (does not apply to an empty string which is returned as is).
+ *
+ * @return mixed A random value from the given sequence
+ */
+function twig_random(Twig_Environment $env, $values = null)
+{
+    if (null === $values) {
+        return mt_rand();
+    }
+
+    if (is_int($values) || is_float($values)) {
+        return $values < 0 ? mt_rand($values, 0) : mt_rand(0, $values);
+    }
+
+    if ($values instanceof Traversable) {
+        $values = iterator_to_array($values);
+    } elseif (is_string($values)) {
+        if ('' === $values) {
+            return '';
+        }
+        if (null !== $charset = $env->getCharset()) {
+            if ('UTF-8' !== $charset) {
+                $values = twig_convert_encoding($values, 'UTF-8', $charset);
+            }
+
+            // unicode version of str_split()
+            // split at all positions, but not after the start and not before the end
+            $values = preg_split('/(?<!^)(?!$)/u', $values);
+
+            if ('UTF-8' !== $charset) {
+                foreach ($values as $i => $value) {
+                    $values[$i] = twig_convert_encoding($value, $charset, 'UTF-8');
+                }
+            }
+        } else {
+            return $values[mt_rand(0, strlen($values) - 1)];
+        }
+    }
+
+    if (!is_array($values)) {
+        return $values;
+    }
+
+    if (0 === count($values)) {
+        throw new Twig_Error_Runtime('The random function cannot pick from an empty array.');
+    }
+
+    return $values[array_rand($values, 1)];
+}
+
+/**
+ * Converts a date to the given format.
+ *
+ * <pre>
+ *   {{ post.published_at|date("m/d/Y") }}
+ * </pre>
+ *
+ * @param Twig_Environment                               $env      A Twig_Environment instance
+ * @param DateTime|DateTimeInterface|DateInterval|string $date     A date
+ * @param string|null                                    $format   The target format, null to use the default
+ * @param DateTimeZone|string|null|false                 $timezone The target timezone, null to use the default, false to leave unchanged
+ *
+ * @return string The formatted date
+ */
+function twig_date_format_filter(Twig_Environment $env, $date, $format = null, $timezone = null)
+{
+    if (null === $format) {
+        $formats = $env->getExtension('core')->getDateFormat();
+        $format = $date instanceof DateInterval ? $formats[1] : $formats[0];
+    }
+
+    if ($date instanceof DateInterval) {
+        return $date->format($format);
+    }
+
+    return twig_date_converter($env, $date, $timezone)->format($format);
+}
+
+/**
+ * Returns a new date object modified.
+ *
+ * <pre>
+ *   {{ post.published_at|date_modify("-1day")|date("m/d/Y") }}
+ * </pre>
+ *
+ * @param Twig_Environment $env      A Twig_Environment instance
+ * @param DateTime|string  $date     A date
+ * @param string           $modifier A modifier string
+ *
+ * @return DateTime A new date object
+ */
+function twig_date_modify_filter(Twig_Environment $env, $date, $modifier)
+{
+    $date = twig_date_converter($env, $date, false);
+    $resultDate = $date->modify($modifier);
+
+    // This is a hack to ensure PHP 5.2 support and support for DateTimeImmutable
+    // DateTime::modify does not return the modified DateTime object < 5.3.0
+    // and DateTimeImmutable does not modify $date.
+    return null === $resultDate ? $date : $resultDate;
+}
+
+/**
+ * Converts an input to a DateTime instance.
+ *
+ * <pre>
+ *    {% if date(user.created_at) < date('+2days') %}
+ *      {# do something #}
+ *    {% endif %}
+ * </pre>
+ *
+ * @param Twig_Environment                       $env      A Twig_Environment instance
+ * @param DateTime|DateTimeInterface|string|null $date     A date
+ * @param DateTimeZone|string|null|false         $timezone The target timezone, null to use the default, false to leave unchanged
+ *
+ * @return DateTime A DateTime instance
+ */
+function twig_date_converter(Twig_Environment $env, $date = null, $timezone = null)
+{
+    // determine the timezone
+    if (false !== $timezone) {
+        if (null === $timezone) {
+            $timezone = $env->getExtension('core')->getTimezone();
+        } elseif (!$timezone instanceof DateTimeZone) {
+            $timezone = new DateTimeZone($timezone);
+        }
+    }
+
+    // immutable dates
+    if ($date instanceof DateTimeImmutable) {
+        return false !== $timezone ? $date->setTimezone($timezone) : $date;
+    }
+
+    if ($date instanceof DateTime || $date instanceof DateTimeInterface) {
+        $date = clone $date;
+        if (false !== $timezone) {
+            $date->setTimezone($timezone);
+        }
+
+        return $date;
+    }
+
+    if (null === $date || 'now' === $date) {
+        return new DateTime($date, false !== $timezone ? $timezone : $env->getExtension('core')->getTimezone());
+    }
+
+    $asString = (string) $date;
+    if (ctype_digit($asString) || (!empty($asString) && '-' === $asString[0] && ctype_digit(substr($asString, 1)))) {
+        $date = new DateTime('@'.$date);
+    } else {
+        $date = new DateTime($date, $env->getExtension('core')->getTimezone());
+    }
+
+    if (false !== $timezone) {
+        $date->setTimezone($timezone);
+    }
+
+    return $date;
+}
+
+/**
+ * Replaces strings within a string.
+ *
+ * @param string            $str  String to replace in
+ * @param array|Traversable $from Replace values
+ * @param string|null       $to   Replace to, deprecated (@see http://php.net/manual/en/function.strtr.php)
+ *
+ * @return string
+ */
+function twig_replace_filter($str, $from, $to = null)
+{
+    if ($from instanceof Traversable) {
+        $from = iterator_to_array($from);
+    } elseif (is_string($from) && is_string($to)) {
+        @trigger_error('Using "replace" with character by character replacement is deprecated since version 1.22 and will be removed in Twig 2.0', E_USER_DEPRECATED);
+
+        return strtr($str, $from, $to);
+    } elseif (!is_array($from)) {
+        throw new Twig_Error_Runtime(sprintf('The "replace" filter expects an array or "Traversable" as replace values, got "%s".',is_object($from) ? get_class($from) : gettype($from)));
+    }
+
+    return strtr($str, $from);
+}
+
+/**
+ * Rounds a number.
+ *
+ * @param int|float $value     The value to round
+ * @param int|float $precision The rounding precision
+ * @param string    $method    The method to use for rounding
+ *
+ * @return int|float The rounded number
+ */
+function twig_round($value, $precision = 0, $method = 'common')
+{
+    if ('common' == $method) {
+        return round($value, $precision);
+    }
+
+    if ('ceil' != $method && 'floor' != $method) {
+        throw new Twig_Error_Runtime('The round filter only supports the "common", "ceil", and "floor" methods.');
+    }
+
+    return $method($value * pow(10, $precision)) / pow(10, $precision);
+}
+
+/**
+ * Number format filter.
+ *
+ * All of the formatting options can be left null, in that case the defaults will
+ * be used.  Supplying any of the parameters will override the defaults set in the
+ * environment object.
+ *
+ * @param Twig_Environment $env          A Twig_Environment instance
+ * @param mixed            $number       A float/int/string of the number to format
+ * @param int              $decimal      The number of decimal points to display.
+ * @param string           $decimalPoint The character(s) to use for the decimal point.
+ * @param string           $thousandSep  The character(s) to use for the thousands separator.
+ *
+ * @return string The formatted number
+ */
+function twig_number_format_filter(Twig_Environment $env, $number, $decimal = null, $decimalPoint = null, $thousandSep = null)
+{
+    $defaults = $env->getExtension('core')->getNumberFormat();
+    if (null === $decimal) {
+        $decimal = $defaults[0];
+    }
+
+    if (null === $decimalPoint) {
+        $decimalPoint = $defaults[1];
+    }
+
+    if (null === $thousandSep) {
+        $thousandSep = $defaults[2];
+    }
+
+    return number_format((float) $number, $decimal, $decimalPoint, $thousandSep);
+}
+
+/**
+ * URL encodes (RFC 3986) a string as a path segment or an array as a query string.
+ *
+ * @param string|array $url A URL or an array of query parameters
+ *
+ * @return string The URL encoded value
+ */
+function twig_urlencode_filter($url)
+{
+    if (is_array($url)) {
+        if (defined('PHP_QUERY_RFC3986')) {
+            return http_build_query($url, '', '&', PHP_QUERY_RFC3986);
+        }
+
+        return http_build_query($url, '', '&');
+    }
+
+    return rawurlencode($url);
+}
+
+if (PHP_VERSION_ID < 50300) {
+    /**
+     * JSON encodes a variable.
+     *
+     * @param mixed $value   The value to encode.
+     * @param int   $options Not used on PHP 5.2.x
+     *
+     * @return mixed The JSON encoded value
+     */
+    function twig_jsonencode_filter($value, $options = 0)
+    {
+        if ($value instanceof Twig_Markup) {
+            $value = (string) $value;
+        } elseif (is_array($value)) {
+            array_walk_recursive($value, '_twig_markup2string');
+        }
+
+        return json_encode($value);
+    }
+} else {
+    /**
+     * JSON encodes a variable.
+     *
+     * @param mixed $value   The value to encode.
+     * @param int   $options Bitmask consisting of JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_NUMERIC_CHECK, JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, JSON_FORCE_OBJECT
+     *
+     * @return mixed The JSON encoded value
+     */
+    function twig_jsonencode_filter($value, $options = 0)
+    {
+        if ($value instanceof Twig_Markup) {
+            $value = (string) $value;
+        } elseif (is_array($value)) {
+            array_walk_recursive($value, '_twig_markup2string');
+        }
+
+        return json_encode($value, $options);
+    }
+}
+
+function _twig_markup2string(&$value)
+{
+    if ($value instanceof Twig_Markup) {
+        $value = (string) $value;
+    }
+}
+
+/**
+ * Merges an array with another one.
+ *
+ * <pre>
+ *  {% set items = { 'apple': 'fruit', 'orange': 'fruit' } %}
+ *
+ *  {% set items = items|merge({ 'peugeot': 'car' }) %}
+ *
+ *  {# items now contains { 'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'car' } #}
+ * </pre>
+ *
+ * @param array|Traversable $arr1 An array
+ * @param array|Traversable $arr2 An array
+ *
+ * @return array The merged array
+ */
+function twig_array_merge($arr1, $arr2)
+{
+    if ($arr1 instanceof Traversable) {
+        $arr1 = iterator_to_array($arr1);
+    } elseif (!is_array($arr1)) {
+        throw new Twig_Error_Runtime(sprintf('The merge filter only works with arrays or "Traversable", got "%s" as first argument.', gettype($arr1)));
+    }
+
+    if ($arr2 instanceof Traversable) {
+        $arr2 = iterator_to_array($arr2);
+    } elseif (!is_array($arr2)) {
+        throw new Twig_Error_Runtime(sprintf('The merge filter only works with arrays or "Traversable", got "%s" as second argument.', gettype($arr2)));
+    }
+
+    return array_merge($arr1, $arr2);
+}
+
+/**
+ * Slices a variable.
+ *
+ * @param Twig_Environment $env          A Twig_Environment instance
+ * @param mixed            $item         A variable
+ * @param int              $start        Start of the slice
+ * @param int              $length       Size of the slice
+ * @param bool             $preserveKeys Whether to preserve key or not (when the input is an array)
+ *
+ * @return mixed The sliced variable
+ */
+function twig_slice(Twig_Environment $env, $item, $start, $length = null, $preserveKeys = false)
+{
+    if ($item instanceof Traversable) {
+        if ($item instanceof IteratorAggregate) {
+            $item = $item->getIterator();
+        }
+
+        if ($start >= 0 && $length >= 0 && $item instanceof Iterator) {
+            try {
+                return iterator_to_array(new LimitIterator($item, $start, $length === null ? -1 : $length), $preserveKeys);
+            } catch (OutOfBoundsException $exception) {
+                return array();
+            }
+        }
+
+        $item = iterator_to_array($item, $preserveKeys);
+    }
+
+    if (is_array($item)) {
+        return array_slice($item, $start, $length, $preserveKeys);
+    }
+
+    $item = (string) $item;
+
+    if (function_exists('mb_get_info') && null !== $charset = $env->getCharset()) {
+        return (string) mb_substr($item, $start, null === $length ? mb_strlen($item, $charset) - $start : $length, $charset);
+    }
+
+    return (string) (null === $length ? substr($item, $start) : substr($item, $start, $length));
+}
+
+/**
+ * Returns the first element of the item.
+ *
+ * @param Twig_Environment $env  A Twig_Environment instance
+ * @param mixed            $item A variable
+ *
+ * @return mixed The first element of the item
+ */
+function twig_first(Twig_Environment $env, $item)
+{
+    $elements = twig_slice($env, $item, 0, 1, false);
+
+    return is_string($elements) ? $elements : current($elements);
+}
+
+/**
+ * Returns the last element of the item.
+ *
+ * @param Twig_Environment $env  A Twig_Environment instance
+ * @param mixed            $item A variable
+ *
+ * @return mixed The last element of the item
+ */
+function twig_last(Twig_Environment $env, $item)
+{
+    $elements = twig_slice($env, $item, -1, 1, false);
+
+    return is_string($elements) ? $elements : current($elements);
+}
+
+/**
+ * Joins the values to a string.
+ *
+ * The separator between elements is an empty string per default, you can define it with the optional parameter.
+ *
+ * <pre>
+ *  {{ [1, 2, 3]|join('|') }}
+ *  {# returns 1|2|3 #}
+ *
+ *  {{ [1, 2, 3]|join }}
+ *  {# returns 123 #}
+ * </pre>
+ *
+ * @param array  $value An array
+ * @param string $glue  The separator
+ *
+ * @return string The concatenated string
+ */
+function twig_join_filter($value, $glue = '')
+{
+    if ($value instanceof Traversable) {
+        $value = iterator_to_array($value, false);
+    }
+
+    return implode($glue, (array) $value);
+}
+
+/**
+ * Splits the string into an array.
+ *
+ * <pre>
+ *  {{ "one,two,three"|split(',') }}
+ *  {# returns [one, two, three] #}
+ *
+ *  {{ "one,two,three,four,five"|split(',', 3) }}
+ *  {# returns [one, two, "three,four,five"] #}
+ *
+ *  {{ "123"|split('') }}
+ *  {# returns [1, 2, 3] #}
+ *
+ *  {{ "aabbcc"|split('', 2) }}
+ *  {# returns [aa, bb, cc] #}
+ * </pre>
+ *
+ * @param Twig_Environment $env       A Twig_Environment instance
+ * @param string           $value     A string
+ * @param string           $delimiter The delimiter
+ * @param int              $limit     The limit
+ *
+ * @return array The split string as an array
+ */
+function twig_split_filter(Twig_Environment $env, $value, $delimiter, $limit = null)
+{
+    if (!empty($delimiter)) {
+        return null === $limit ? explode($delimiter, $value) : explode($delimiter, $value, $limit);
+    }
+
+    if (!function_exists('mb_get_info') || null === $charset = $env->getCharset()) {
+        return str_split($value, null === $limit ? 1 : $limit);
+    }
+
+    if ($limit <= 1) {
+        return preg_split('/(?<!^)(?!$)/u', $value);
+    }
+
+    $length = mb_strlen($value, $charset);
+    if ($length < $limit) {
+        return array($value);
+    }
+
+    $r = array();
+    for ($i = 0; $i < $length; $i += $limit) {
+        $r[] = mb_substr($value, $i, $limit, $charset);
+    }
+
+    return $r;
+}
+
+// The '_default' filter is used internally to avoid using the ternary operator
+// which costs a lot for big contexts (before PHP 5.4). So, on average,
+// a function call is cheaper.
+/**
+ * @internal
+ */
+function _twig_default_filter($value, $default = '')
+{
+    if (twig_test_empty($value)) {
+        return $default;
+    }
+
+    return $value;
+}
+
+/**
+ * Returns the keys for the given array.
+ *
+ * It is useful when you want to iterate over the keys of an array:
+ *
+ * <pre>
+ *  {% for key in array|keys %}
+ *      {# ... #}
+ *  {% endfor %}
+ * </pre>
+ *
+ * @param array $array An array
+ *
+ * @return array The keys
+ */
+function twig_get_array_keys_filter($array)
+{
+    if ($array instanceof Traversable) {
+        return array_keys(iterator_to_array($array));
+    }
+
+    if (!is_array($array)) {
+        return array();
+    }
+
+    return array_keys($array);
+}
+
+/**
+ * Reverses a variable.
+ *
+ * @param Twig_Environment         $env          A Twig_Environment instance
+ * @param array|Traversable|string $item         An array, a Traversable instance, or a string
+ * @param bool                     $preserveKeys Whether to preserve key or not
+ *
+ * @return mixed The reversed input
+ */
+function twig_reverse_filter(Twig_Environment $env, $item, $preserveKeys = false)
+{
+    if ($item instanceof Traversable) {
+        return array_reverse(iterator_to_array($item), $preserveKeys);
+    }
+
+    if (is_array($item)) {
+        return array_reverse($item, $preserveKeys);
+    }
+
+    if (null !== $charset = $env->getCharset()) {
+        $string = (string) $item;
+
+        if ('UTF-8' !== $charset) {
+            $item = twig_convert_encoding($string, 'UTF-8', $charset);
+        }
+
+        preg_match_all('/./us', $item, $matches);
+
+        $string = implode('', array_reverse($matches[0]));
+
+        if ('UTF-8' !== $charset) {
+            $string = twig_convert_encoding($string, $charset, 'UTF-8');
+        }
+
+        return $string;
+    }
+
+    return strrev((string) $item);
+}
+
+/**
+ * Sorts an array.
+ *
+ * @param array|Traversable $array
+ *
+ * @return array
+ */
+function twig_sort_filter($array)
+{
+    if ($array instanceof Traversable) {
+        $array = iterator_to_array($array);
+    } elseif (!is_array($array)) {
+        throw new Twig_Error_Runtime(sprintf('The sort filter only works with arrays or "Traversable", got "%s".', gettype($array)));
+    }
+
+    asort($array);
+
+    return $array;
+}
+
+/**
+ * @internal
+ */
+function twig_in_filter($value, $compare)
+{
+    if (is_array($compare)) {
+        return in_array($value, $compare, is_object($value) || is_resource($value));
+    } elseif (is_string($compare) && (is_string($value) || is_int($value) || is_float($value))) {
+        return '' === $value || false !== strpos($compare, (string) $value);
+    } elseif ($compare instanceof Traversable) {
+        return in_array($value, iterator_to_array($compare, false), is_object($value) || is_resource($value));
+    }
+
+    return false;
+}
+
+/**
+ * Escapes a string.
+ *
+ * @param Twig_Environment $env        A Twig_Environment instance
+ * @param string           $string     The value to be escaped
+ * @param string           $strategy   The escaping strategy
+ * @param string           $charset    The charset
+ * @param bool             $autoescape Whether the function is called by the auto-escaping feature (true) or by the developer (false)
+ *
+ * @return string
+ */
+function twig_escape_filter(Twig_Environment $env, $string, $strategy = 'html', $charset = null, $autoescape = false)
+{
+    if ($autoescape && $string instanceof Twig_Markup) {
+        return $string;
+    }
+
+    if (!is_string($string)) {
+        if (is_object($string) && method_exists($string, '__toString')) {
+            $string = (string) $string;
+        } elseif (in_array($strategy, array('html', 'js', 'css', 'html_attr', 'url'))) {
+            return $string;
+        }
+    }
+
+    if (null === $charset) {
+        $charset = $env->getCharset();
+    }
+
+    switch ($strategy) {
+        case 'html':
+            // see http://php.net/htmlspecialchars
+
+            // Using a static variable to avoid initializing the array
+            // each time the function is called. Moving the declaration on the
+            // top of the function slow downs other escaping strategies.
+            static $htmlspecialcharsCharsets;
+
+            if (null === $htmlspecialcharsCharsets) {
+                if (defined('HHVM_VERSION')) {
+                    $htmlspecialcharsCharsets = array('utf-8' => true, 'UTF-8' => true);
+                } else {
+                    $htmlspecialcharsCharsets = array(
+                        'ISO-8859-1' => true, 'ISO8859-1' => true,
+                        'ISO-8859-15' => true, 'ISO8859-15' => true,
+                        'utf-8' => true, 'UTF-8' => true,
+                        'CP866' => true, 'IBM866' => true, '866' => true,
+                        'CP1251' => true, 'WINDOWS-1251' => true, 'WIN-1251' => true,
+                        '1251' => true,
+                        'CP1252' => true, 'WINDOWS-1252' => true, '1252' => true,
+                        'KOI8-R' => true, 'KOI8-RU' => true, 'KOI8R' => true,
+                        'BIG5' => true, '950' => true,
+                        'GB2312' => true, '936' => true,
+                        'BIG5-HKSCS' => true,
+                        'SHIFT_JIS' => true, 'SJIS' => true, '932' => true,
+                        'EUC-JP' => true, 'EUCJP' => true,
+                        'ISO8859-5' => true, 'ISO-8859-5' => true, 'MACROMAN' => true,
+                    );
+                }
+            }
+
+            if (isset($htmlspecialcharsCharsets[$charset])) {
+                return htmlspecialchars($string, ENT_QUOTES | ENT_SUBSTITUTE, $charset);
+            }
+
+            if (isset($htmlspecialcharsCharsets[strtoupper($charset)])) {
+                // cache the lowercase variant for future iterations
+                $htmlspecialcharsCharsets[$charset] = true;
+
+                return htmlspecialchars($string, ENT_QUOTES | ENT_SUBSTITUTE, $charset);
+            }
+
+            $string = twig_convert_encoding($string, 'UTF-8', $charset);
+            $string = htmlspecialchars($string, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
+
+            return twig_convert_encoding($string, $charset, 'UTF-8');
+
+        case 'js':
+            // escape all non-alphanumeric characters
+            // into their \xHH or \uHHHH representations
+            if ('UTF-8' !== $charset) {
+                $string = twig_convert_encoding($string, 'UTF-8', $charset);
+            }
+
+            if (0 == strlen($string) ? false : (1 == preg_match('/^./su', $string) ? false : true)) {
+                throw new Twig_Error_Runtime('The string to escape is not a valid UTF-8 string.');
+            }
+
+            $string = preg_replace_callback('#[^a-zA-Z0-9,\._]#Su', '_twig_escape_js_callback', $string);
+
+            if ('UTF-8' !== $charset) {
+                $string = twig_convert_encoding($string, $charset, 'UTF-8');
+            }
+
+            return $string;
+
+        case 'css':
+            if ('UTF-8' !== $charset) {
+                $string = twig_convert_encoding($string, 'UTF-8', $charset);
+            }
+
+            if (0 == strlen($string) ? false : (1 == preg_match('/^./su', $string) ? false : true)) {
+                throw new Twig_Error_Runtime('The string to escape is not a valid UTF-8 string.');
+            }
+
+            $string = preg_replace_callback('#[^a-zA-Z0-9]#Su', '_twig_escape_css_callback', $string);
+
+            if ('UTF-8' !== $charset) {
+                $string = twig_convert_encoding($string, $charset, 'UTF-8');
+            }
+
+            return $string;
+
+        case 'html_attr':
+            if ('UTF-8' !== $charset) {
+                $string = twig_convert_encoding($string, 'UTF-8', $charset);
+            }
+
+            if (0 == strlen($string) ? false : (1 == preg_match('/^./su', $string) ? false : true)) {
+                throw new Twig_Error_Runtime('The string to escape is not a valid UTF-8 string.');
+            }
+
+            $string = preg_replace_callback('#[^a-zA-Z0-9,\.\-_]#Su', '_twig_escape_html_attr_callback', $string);
+
+            if ('UTF-8' !== $charset) {
+                $string = twig_convert_encoding($string, $charset, 'UTF-8');
+            }
+
+            return $string;
+
+        case 'url':
+            if (PHP_VERSION_ID < 50300) {
+                return str_replace('%7E', '~', rawurlencode($string));
+            }
+
+            return rawurlencode($string);
+
+        default:
+            static $escapers;
+
+            if (null === $escapers) {
+                $escapers = $env->getExtension('core')->getEscapers();
+            }
+
+            if (isset($escapers[$strategy])) {
+                return call_user_func($escapers[$strategy], $env, $string, $charset);
+            }
+
+            $validStrategies = implode(', ', array_merge(array('html', 'js', 'url', 'css', 'html_attr'), array_keys($escapers)));
+
+            throw new Twig_Error_Runtime(sprintf('Invalid escaping strategy "%s" (valid ones: %s).', $strategy, $validStrategies));
+    }
+}
+
+/**
+ * @internal
+ */
+function twig_escape_filter_is_safe(Twig_Node $filterArgs)
+{
+    foreach ($filterArgs as $arg) {
+        if ($arg instanceof Twig_Node_Expression_Constant) {
+            return array($arg->getAttribute('value'));
+        }
+
+        return array();
+    }
+
+    return array('html');
+}
+
+if (function_exists('mb_convert_encoding')) {
+    function twig_convert_encoding($string, $to, $from)
+    {
+        return mb_convert_encoding($string, $to, $from);
+    }
+} elseif (function_exists('iconv')) {
+    function twig_convert_encoding($string, $to, $from)
+    {
+        return iconv($from, $to, $string);
+    }
+} else {
+    function twig_convert_encoding($string, $to, $from)
+    {
+        throw new Twig_Error_Runtime('No suitable convert encoding function (use UTF-8 as your encoding or install the iconv or mbstring extension).');
+    }
+}
+
+function _twig_escape_js_callback($matches)
+{
+    $char = $matches[0];
+
+    // \xHH
+    if (!isset($char[1])) {
+        return '\\x'.strtoupper(substr('00'.bin2hex($char), -2));
+    }
+
+    // \uHHHH
+    $char = twig_convert_encoding($char, 'UTF-16BE', 'UTF-8');
+
+    return '\\u'.strtoupper(substr('0000'.bin2hex($char), -4));
+}
+
+function _twig_escape_css_callback($matches)
+{
+    $char = $matches[0];
+
+    // \xHH
+    if (!isset($char[1])) {
+        $hex = ltrim(strtoupper(bin2hex($char)), '0');
+        if (0 === strlen($hex)) {
+            $hex = '0';
+        }
+
+        return '\\'.$hex.' ';
+    }
+
+    // \uHHHH
+    $char = twig_convert_encoding($char, 'UTF-16BE', 'UTF-8');
+
+    return '\\'.ltrim(strtoupper(bin2hex($char)), '0').' ';
+}
+
+/**
+ * This function is adapted from code coming from Zend Framework.
+ *
+ * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+function _twig_escape_html_attr_callback($matches)
+{
+    /*
+     * While HTML supports far more named entities, the lowest common denominator
+     * has become HTML5's XML Serialisation which is restricted to the those named
+     * entities that XML supports. Using HTML entities would result in this error:
+     *     XML Parsing Error: undefined entity
+     */
+    static $entityMap = array(
+        34 => 'quot', /* quotation mark */
+        38 => 'amp',  /* ampersand */
+        60 => 'lt',   /* less-than sign */
+        62 => 'gt',   /* greater-than sign */
+    );
+
+    $chr = $matches[0];
+    $ord = ord($chr);
+
+    /*
+     * The following replaces characters undefined in HTML with the
+     * hex entity for the Unicode replacement character.
+     */
+    if (($ord <= 0x1f && $chr != "\t" && $chr != "\n" && $chr != "\r") || ($ord >= 0x7f && $ord <= 0x9f)) {
+        return '&#xFFFD;';
+    }
+
+    /*
+     * Check if the current character to escape has a name entity we should
+     * replace it with while grabbing the hex value of the character.
+     */
+    if (strlen($chr) == 1) {
+        $hex = strtoupper(substr('00'.bin2hex($chr), -2));
+    } else {
+        $chr = twig_convert_encoding($chr, 'UTF-16BE', 'UTF-8');
+        $hex = strtoupper(substr('0000'.bin2hex($chr), -4));
+    }
+
+    $int = hexdec($hex);
+    if (array_key_exists($int, $entityMap)) {
+        return sprintf('&%s;', $entityMap[$int]);
+    }
+
+    /*
+     * Per OWASP recommendations, we'll use hex entities for any other
+     * characters where a named entity does not exist.
+     */
+    return sprintf('&#x%s;', $hex);
+}
+
+// add multibyte extensions if possible
+if (function_exists('mb_get_info')) {
+    /**
+     * Returns the length of a variable.
+     *
+     * @param Twig_Environment $env   A Twig_Environment instance
+     * @param mixed            $thing A variable
+     *
+     * @return int The length of the value
+     */
+    function twig_length_filter(Twig_Environment $env, $thing)
+    {
+        return is_scalar($thing) ? mb_strlen($thing, $env->getCharset()) : count($thing);
+    }
+
+    /**
+     * Converts a string to uppercase.
+     *
+     * @param Twig_Environment $env    A Twig_Environment instance
+     * @param string           $string A string
+     *
+     * @return string The uppercased string
+     */
+    function twig_upper_filter(Twig_Environment $env, $string)
+    {
+        if (null !== $charset = $env->getCharset()) {
+            return mb_strtoupper($string, $charset);
+        }
+
+        return strtoupper($string);
+    }
+
+    /**
+     * Converts a string to lowercase.
+     *
+     * @param Twig_Environment $env    A Twig_Environment instance
+     * @param string           $string A string
+     *
+     * @return string The lowercased string
+     */
+    function twig_lower_filter(Twig_Environment $env, $string)
+    {
+        if (null !== $charset = $env->getCharset()) {
+            return mb_strtolower($string, $charset);
+        }
+
+        return strtolower($string);
+    }
+
+    /**
+     * Returns a titlecased string.
+     *
+     * @param Twig_Environment $env    A Twig_Environment instance
+     * @param string           $string A string
+     *
+     * @return string The titlecased string
+     */
+    function twig_title_string_filter(Twig_Environment $env, $string)
+    {
+        if (null !== $charset = $env->getCharset()) {
+            return mb_convert_case($string, MB_CASE_TITLE, $charset);
+        }
+
+        return ucwords(strtolower($string));
+    }
+
+    /**
+     * Returns a capitalized string.
+     *
+     * @param Twig_Environment $env    A Twig_Environment instance
+     * @param string           $string A string
+     *
+     * @return string The capitalized string
+     */
+    function twig_capitalize_string_filter(Twig_Environment $env, $string)
+    {
+        if (null !== $charset = $env->getCharset()) {
+            return mb_strtoupper(mb_substr($string, 0, 1, $charset), $charset).mb_strtolower(mb_substr($string, 1, mb_strlen($string, $charset), $charset), $charset);
+        }
+
+        return ucfirst(strtolower($string));
+    }
+}
+// and byte fallback
+else {
+    /**
+     * Returns the length of a variable.
+     *
+     * @param Twig_Environment $env   A Twig_Environment instance
+     * @param mixed            $thing A variable
+     *
+     * @return int The length of the value
+     */
+    function twig_length_filter(Twig_Environment $env, $thing)
+    {
+        return is_scalar($thing) ? strlen($thing) : count($thing);
+    }
+
+    /**
+     * Returns a titlecased string.
+     *
+     * @param Twig_Environment $env    A Twig_Environment instance
+     * @param string           $string A string
+     *
+     * @return string The titlecased string
+     */
+    function twig_title_string_filter(Twig_Environment $env, $string)
+    {
+        return ucwords(strtolower($string));
+    }
+
+    /**
+     * Returns a capitalized string.
+     *
+     * @param Twig_Environment $env    A Twig_Environment instance
+     * @param string           $string A string
+     *
+     * @return string The capitalized string
+     */
+    function twig_capitalize_string_filter(Twig_Environment $env, $string)
+    {
+        return ucfirst(strtolower($string));
+    }
+}
+
+/**
+ * @internal
+ */
+function twig_ensure_traversable($seq)
+{
+    if ($seq instanceof Traversable || is_array($seq)) {
+        return $seq;
+    }
+
+    return array();
+}
+
+/**
+ * Checks if a variable is empty.
+ *
+ * <pre>
+ * {# evaluates to true if the foo variable is null, false, or the empty string #}
+ * {% if foo is empty %}
+ *     {# ... #}
+ * {% endif %}
+ * </pre>
+ *
+ * @param mixed $value A variable
+ *
+ * @return bool true if the value is empty, false otherwise
+ */
+function twig_test_empty($value)
+{
+    if ($value instanceof Countable) {
+        return 0 == count($value);
+    }
+
+    return '' === $value || false === $value || null === $value || array() === $value;
+}
+
+/**
+ * Checks if a variable is traversable.
+ *
+ * <pre>
+ * {# evaluates to true if the foo variable is an array or a traversable object #}
+ * {% if foo is traversable %}
+ *     {# ... #}
+ * {% endif %}
+ * </pre>
+ *
+ * @param mixed $value A variable
+ *
+ * @return bool true if the value is traversable
+ */
+function twig_test_iterable($value)
+{
+    return $value instanceof Traversable || is_array($value);
+}
+
+/**
+ * Renders a template.
+ *
+ * @param Twig_Environment $env
+ * @param array            $context
+ * @param string|array     $template      The template to render or an array of templates to try consecutively
+ * @param array            $variables     The variables to pass to the template
+ * @param bool             $withContext
+ * @param bool             $ignoreMissing Whether to ignore missing templates or not
+ * @param bool             $sandboxed     Whether to sandbox the template or not
+ *
+ * @return string The rendered template
+ */
+function twig_include(Twig_Environment $env, $context, $template, $variables = array(), $withContext = true, $ignoreMissing = false, $sandboxed = false)
+{
+    $alreadySandboxed = false;
+    $sandbox = null;
+    if ($withContext) {
+        $variables = array_merge($context, $variables);
+    }
+
+    if ($isSandboxed = $sandboxed && $env->hasExtension('sandbox')) {
+        $sandbox = $env->getExtension('sandbox');
+        if (!$alreadySandboxed = $sandbox->isSandboxed()) {
+            $sandbox->enableSandbox();
+        }
+    }
+
+    $result = null;
+    try {
+        $result = $env->resolveTemplate($template)->render($variables);
+    } catch (Twig_Error_Loader $e) {
+        if (!$ignoreMissing) {
+            if ($isSandboxed && !$alreadySandboxed) {
+                $sandbox->disableSandbox();
+            }
+
+            throw $e;
+        }
+    }
+
+    if ($isSandboxed && !$alreadySandboxed) {
+        $sandbox->disableSandbox();
+    }
+
+    return $result;
+}
+
+/**
+ * Returns a template content without rendering it.
+ *
+ * @param Twig_Environment $env
+ * @param string           $name          The template name
+ * @param bool             $ignoreMissing Whether to ignore missing templates or not
+ *
+ * @return string The template source
+ */
+function twig_source(Twig_Environment $env, $name, $ignoreMissing = false)
+{
+    try {
+        return $env->getLoader()->getSource($name);
+    } catch (Twig_Error_Loader $e) {
+        if (!$ignoreMissing) {
+            throw $e;
+        }
+    }
+}
+
+/**
+ * Provides the ability to get constants from instances as well as class/global constants.
+ *
+ * @param string      $constant The name of the constant
+ * @param null|object $object   The object to get the constant from
+ *
+ * @return string
+ */
+function twig_constant($constant, $object = null)
+{
+    if (null !== $object) {
+        $constant = get_class($object).'::'.$constant;
+    }
+
+    return constant($constant);
+}
+
+/**
+ * Batches item.
+ *
+ * @param array $items An array of items
+ * @param int   $size  The size of the batch
+ * @param mixed $fill  A value used to fill missing items
+ *
+ * @return array
+ */
+function twig_array_batch($items, $size, $fill = null)
+{
+    if ($items instanceof Traversable) {
+        $items = iterator_to_array($items, false);
+    }
+
+    $size = ceil($size);
+
+    $result = array_chunk($items, $size, true);
+
+    if (null !== $fill && !empty($result)) {
+        $last = count($result) - 1;
+        if ($fillCount = $size - count($result[$last])) {
+            $result[$last] = array_merge(
+                $result[$last],
+                array_fill(0, $fillCount, $fill)
+            );
+        }
+    }
+
+    return $result;
+}
diff --git a/public/system/library/template/Twig/Extension/Debug.php b/public/system/library/template/Twig/Extension/Debug.php
new file mode 100644
index 0000000..42fdb1e
--- /dev/null
+++ b/public/system/library/template/Twig/Extension/Debug.php
@@ -0,0 +1,61 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_Debug extends Twig_Extension
+{
+    public function getFunctions()
+    {
+        // dump is safe if var_dump is overridden by xdebug
+        $isDumpOutputHtmlSafe = extension_loaded('xdebug')
+            // false means that it was not set (and the default is on) or it explicitly enabled
+            && (false === ini_get('xdebug.overload_var_dump') || ini_get('xdebug.overload_var_dump'))
+            // false means that it was not set (and the default is on) or it explicitly enabled
+            // xdebug.overload_var_dump produces HTML only when html_errors is also enabled
+            && (false === ini_get('html_errors') || ini_get('html_errors'))
+            || 'cli' === php_sapi_name()
+        ;
+
+        return array(
+            new Twig_SimpleFunction('dump', 'twig_var_dump', array('is_safe' => $isDumpOutputHtmlSafe ? array('html') : array(), 'needs_context' => true, 'needs_environment' => true)),
+        );
+    }
+
+    public function getName()
+    {
+        return 'debug';
+    }
+}
+
+function twig_var_dump(Twig_Environment $env, $context)
+{
+    if (!$env->isDebug()) {
+        return;
+    }
+
+    ob_start();
+
+    $count = func_num_args();
+    if (2 === $count) {
+        $vars = array();
+        foreach ($context as $key => $value) {
+            if (!$value instanceof Twig_Template) {
+                $vars[$key] = $value;
+            }
+        }
+
+        var_dump($vars);
+    } else {
+        for ($i = 2; $i < $count; ++$i) {
+            var_dump(func_get_arg($i));
+        }
+    }
+
+    return ob_get_clean();
+}
diff --git a/public/system/library/template/Twig/Extension/Escaper.php b/public/system/library/template/Twig/Extension/Escaper.php
new file mode 100644
index 0000000..0be721d
--- /dev/null
+++ b/public/system/library/template/Twig/Extension/Escaper.php
@@ -0,0 +1,102 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_Escaper extends Twig_Extension
+{
+    protected $defaultStrategy;
+
+    /**
+     * Constructor.
+     *
+     * @param string|false|callable $defaultStrategy An escaping strategy
+     *
+     * @see setDefaultStrategy()
+     */
+    public function __construct($defaultStrategy = 'html')
+    {
+        $this->setDefaultStrategy($defaultStrategy);
+    }
+
+    public function getTokenParsers()
+    {
+        return array(new Twig_TokenParser_AutoEscape());
+    }
+
+    public function getNodeVisitors()
+    {
+        return array(new Twig_NodeVisitor_Escaper());
+    }
+
+    public function getFilters()
+    {
+        return array(
+            new Twig_SimpleFilter('raw', 'twig_raw_filter', array('is_safe' => array('all'))),
+        );
+    }
+
+    /**
+     * Sets the default strategy to use when not defined by the user.
+     *
+     * The strategy can be a valid PHP callback that takes the template
+     * "filename" as an argument and returns the strategy to use.
+     *
+     * @param string|false|callable $defaultStrategy An escaping strategy
+     */
+    public function setDefaultStrategy($defaultStrategy)
+    {
+        // for BC
+        if (true === $defaultStrategy) {
+            @trigger_error('Using "true" as the default strategy is deprecated since version 1.21. Use "html" instead.', E_USER_DEPRECATED);
+
+            $defaultStrategy = 'html';
+        }
+
+        if ('filename' === $defaultStrategy) {
+            $defaultStrategy = array('Twig_FileExtensionEscapingStrategy', 'guess');
+        }
+
+        $this->defaultStrategy = $defaultStrategy;
+    }
+
+    /**
+     * Gets the default strategy to use when not defined by the user.
+     *
+     * @param string $filename The template "filename"
+     *
+     * @return string|false The default strategy to use for the template
+     */
+    public function getDefaultStrategy($filename)
+    {
+        // disable string callables to avoid calling a function named html or js,
+        // or any other upcoming escaping strategy
+        if (!is_string($this->defaultStrategy) && false !== $this->defaultStrategy) {
+            return call_user_func($this->defaultStrategy, $filename);
+        }
+
+        return $this->defaultStrategy;
+    }
+
+    public function getName()
+    {
+        return 'escaper';
+    }
+}
+
+/**
+ * Marks a variable as being safe.
+ *
+ * @param string $string A PHP variable
+ *
+ * @return string
+ */
+function twig_raw_filter($string)
+{
+    return $string;
+}
diff --git a/public/system/library/template/Twig/Extension/GlobalsInterface.php b/public/system/library/template/Twig/Extension/GlobalsInterface.php
new file mode 100644
index 0000000..5370b8e
--- /dev/null
+++ b/public/system/library/template/Twig/Extension/GlobalsInterface.php
@@ -0,0 +1,22 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Enables usage of the deprecated Twig_Extension::getGlobals() method.
+ *
+ * Explicitly implement this interface if you really need to implement the
+ * deprecated getGlobals() method in your extensions.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_Extension_GlobalsInterface
+{
+}
diff --git a/public/system/library/template/Twig/Extension/InitRuntimeInterface.php b/public/system/library/template/Twig/Extension/InitRuntimeInterface.php
new file mode 100644
index 0000000..7a07582
--- /dev/null
+++ b/public/system/library/template/Twig/Extension/InitRuntimeInterface.php
@@ -0,0 +1,22 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Enables usage of the deprecated Twig_Extension::initRuntime() method.
+ *
+ * Explicitly implement this interface if you really need to implement the
+ * deprecated initRuntime() method in your extensions.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_Extension_InitRuntimeInterface
+{
+}
diff --git a/public/system/library/template/Twig/Extension/Optimizer.php b/public/system/library/template/Twig/Extension/Optimizer.php
new file mode 100644
index 0000000..5a64a1a
--- /dev/null
+++ b/public/system/library/template/Twig/Extension/Optimizer.php
@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_Optimizer extends Twig_Extension
+{
+    protected $optimizers;
+
+    public function __construct($optimizers = -1)
+    {
+        $this->optimizers = $optimizers;
+    }
+
+    public function getNodeVisitors()
+    {
+        return array(new Twig_NodeVisitor_Optimizer($this->optimizers));
+    }
+
+    public function getName()
+    {
+        return 'optimizer';
+    }
+}
diff --git a/public/system/library/template/Twig/Extension/Profiler.php b/public/system/library/template/Twig/Extension/Profiler.php
new file mode 100644
index 0000000..4d9f97f
--- /dev/null
+++ b/public/system/library/template/Twig/Extension/Profiler.php
@@ -0,0 +1,46 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Extension_Profiler extends Twig_Extension
+{
+    private $actives = array();
+
+    public function __construct(Twig_Profiler_Profile $profile)
+    {
+        $this->actives[] = $profile;
+    }
+
+    public function enter(Twig_Profiler_Profile $profile)
+    {
+        $this->actives[0]->addProfile($profile);
+        array_unshift($this->actives, $profile);
+    }
+
+    public function leave(Twig_Profiler_Profile $profile)
+    {
+        $profile->leave();
+        array_shift($this->actives);
+
+        if (1 === count($this->actives)) {
+            $this->actives[0]->leave();
+        }
+    }
+
+    public function getNodeVisitors()
+    {
+        return array(new Twig_Profiler_NodeVisitor_Profiler($this->getName()));
+    }
+
+    public function getName()
+    {
+        return 'profiler';
+    }
+}
diff --git a/public/system/library/template/Twig/Extension/Sandbox.php b/public/system/library/template/Twig/Extension/Sandbox.php
new file mode 100644
index 0000000..760d123
--- /dev/null
+++ b/public/system/library/template/Twig/Extension/Sandbox.php
@@ -0,0 +1,97 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_Sandbox extends Twig_Extension
+{
+    protected $sandboxedGlobally;
+    protected $sandboxed;
+    protected $policy;
+
+    public function __construct(Twig_Sandbox_SecurityPolicyInterface $policy, $sandboxed = false)
+    {
+        $this->policy = $policy;
+        $this->sandboxedGlobally = $sandboxed;
+    }
+
+    public function getTokenParsers()
+    {
+        return array(new Twig_TokenParser_Sandbox());
+    }
+
+    public function getNodeVisitors()
+    {
+        return array(new Twig_NodeVisitor_Sandbox());
+    }
+
+    public function enableSandbox()
+    {
+        $this->sandboxed = true;
+    }
+
+    public function disableSandbox()
+    {
+        $this->sandboxed = false;
+    }
+
+    public function isSandboxed()
+    {
+        return $this->sandboxedGlobally || $this->sandboxed;
+    }
+
+    public function isSandboxedGlobally()
+    {
+        return $this->sandboxedGlobally;
+    }
+
+    public function setSecurityPolicy(Twig_Sandbox_SecurityPolicyInterface $policy)
+    {
+        $this->policy = $policy;
+    }
+
+    public function getSecurityPolicy()
+    {
+        return $this->policy;
+    }
+
+    public function checkSecurity($tags, $filters, $functions)
+    {
+        if ($this->isSandboxed()) {
+            $this->policy->checkSecurity($tags, $filters, $functions);
+        }
+    }
+
+    public function checkMethodAllowed($obj, $method)
+    {
+        if ($this->isSandboxed()) {
+            $this->policy->checkMethodAllowed($obj, $method);
+        }
+    }
+
+    public function checkPropertyAllowed($obj, $method)
+    {
+        if ($this->isSandboxed()) {
+            $this->policy->checkPropertyAllowed($obj, $method);
+        }
+    }
+
+    public function ensureToStringAllowed($obj)
+    {
+        if ($this->isSandboxed() && is_object($obj)) {
+            $this->policy->checkMethodAllowed($obj, '__toString');
+        }
+
+        return $obj;
+    }
+
+    public function getName()
+    {
+        return 'sandbox';
+    }
+}
diff --git a/public/system/library/template/Twig/Extension/Staging.php b/public/system/library/template/Twig/Extension/Staging.php
new file mode 100644
index 0000000..d21004d
--- /dev/null
+++ b/public/system/library/template/Twig/Extension/Staging.php
@@ -0,0 +1,94 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Internal class.
+ *
+ * This class is used by Twig_Environment as a staging area and must not be used directly.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @internal
+ */
+class Twig_Extension_Staging extends Twig_Extension
+{
+    protected $functions = array();
+    protected $filters = array();
+    protected $visitors = array();
+    protected $tokenParsers = array();
+    protected $globals = array();
+    protected $tests = array();
+
+    public function addFunction($name, $function)
+    {
+        $this->functions[$name] = $function;
+    }
+
+    public function getFunctions()
+    {
+        return $this->functions;
+    }
+
+    public function addFilter($name, $filter)
+    {
+        $this->filters[$name] = $filter;
+    }
+
+    public function getFilters()
+    {
+        return $this->filters;
+    }
+
+    public function addNodeVisitor(Twig_NodeVisitorInterface $visitor)
+    {
+        $this->visitors[] = $visitor;
+    }
+
+    public function getNodeVisitors()
+    {
+        return $this->visitors;
+    }
+
+    public function addTokenParser(Twig_TokenParserInterface $parser)
+    {
+        $this->tokenParsers[] = $parser;
+    }
+
+    public function getTokenParsers()
+    {
+        return $this->tokenParsers;
+    }
+
+    public function addGlobal($name, $value)
+    {
+        $this->globals[$name] = $value;
+    }
+
+    public function getGlobals()
+    {
+        return $this->globals;
+    }
+
+    public function addTest($name, $test)
+    {
+        $this->tests[$name] = $test;
+    }
+
+    public function getTests()
+    {
+        return $this->tests;
+    }
+
+    public function getName()
+    {
+        return 'staging';
+    }
+}
diff --git a/public/system/library/template/Twig/Extension/StringLoader.php b/public/system/library/template/Twig/Extension/StringLoader.php
new file mode 100644
index 0000000..2a3ddb6
--- /dev/null
+++ b/public/system/library/template/Twig/Extension/StringLoader.php
@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extension_StringLoader extends Twig_Extension
+{
+    public function getFunctions()
+    {
+        return array(
+            new Twig_SimpleFunction('template_from_string', 'twig_template_from_string', array('needs_environment' => true)),
+        );
+    }
+
+    public function getName()
+    {
+        return 'string_loader';
+    }
+}
+
+/**
+ * Loads a template from a string.
+ *
+ * <pre>
+ * {{ include(template_from_string("Hello {{ name }}")) }}
+ * </pre>
+ *
+ * @param Twig_Environment $env      A Twig_Environment instance
+ * @param string           $template A template as a string or object implementing __toString()
+ *
+ * @return Twig_Template A Twig_Template instance
+ */
+function twig_template_from_string(Twig_Environment $env, $template)
+{
+    return $env->createTemplate((string) $template);
+}
diff --git a/public/system/library/template/Twig/ExtensionInterface.php b/public/system/library/template/Twig/ExtensionInterface.php
new file mode 100644
index 0000000..776ffeb
--- /dev/null
+++ b/public/system/library/template/Twig/ExtensionInterface.php
@@ -0,0 +1,87 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by extension classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_ExtensionInterface
+{
+    /**
+     * Initializes the runtime environment.
+     *
+     * This is where you can load some file that contains filter functions for instance.
+     *
+     * @param Twig_Environment $environment The current Twig_Environment instance
+     *
+     * @deprecated since 1.23 (to be removed in 2.0), implement Twig_Extension_InitRuntimeInterface instead
+     */
+    public function initRuntime(Twig_Environment $environment);
+
+    /**
+     * Returns the token parser instances to add to the existing list.
+     *
+     * @return Twig_TokenParserInterface[]
+     */
+    public function getTokenParsers();
+
+    /**
+     * Returns the node visitor instances to add to the existing list.
+     *
+     * @return Twig_NodeVisitorInterface[] An array of Twig_NodeVisitorInterface instances
+     */
+    public function getNodeVisitors();
+
+    /**
+     * Returns a list of filters to add to the existing list.
+     *
+     * @return Twig_SimpleFilter[]
+     */
+    public function getFilters();
+
+    /**
+     * Returns a list of tests to add to the existing list.
+     *
+     * @return Twig_SimpleTest[]
+     */
+    public function getTests();
+
+    /**
+     * Returns a list of functions to add to the existing list.
+     *
+     * @return Twig_SimpleFunction[]
+     */
+    public function getFunctions();
+
+    /**
+     * Returns a list of operators to add to the existing list.
+     *
+     * @return array An array of operators
+     */
+    public function getOperators();
+
+    /**
+     * Returns a list of global variables to add to the existing list.
+     *
+     * @return array An array of global variables
+     *
+     * @deprecated since 1.23 (to be removed in 2.0), implement Twig_Extension_GlobalsInterface instead
+     */
+    public function getGlobals();
+
+    /**
+     * Returns the name of the extension.
+     *
+     * @return string The extension name
+     */
+    public function getName();
+}
diff --git a/public/system/library/template/Twig/FileExtensionEscapingStrategy.php b/public/system/library/template/Twig/FileExtensionEscapingStrategy.php
new file mode 100644
index 0000000..9bda0b4
--- /dev/null
+++ b/public/system/library/template/Twig/FileExtensionEscapingStrategy.php
@@ -0,0 +1,58 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Default autoescaping strategy based on file names.
+ *
+ * This strategy sets the HTML as the default autoescaping strategy,
+ * but changes it based on the filename.
+ *
+ * Note that there is no runtime performance impact as the
+ * default autoescaping strategy is set at compilation time.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_FileExtensionEscapingStrategy
+{
+    /**
+     * Guesses the best autoescaping strategy based on the file name.
+     *
+     * @param string $filename The template file name
+     *
+     * @return string|false The escaping strategy name to use or false to disable
+     */
+    public static function guess($filename)
+    {
+        if (in_array(substr($filename, -1), array('/', '\\'))) {
+            return 'html'; // return html for directories
+        }
+
+        if ('.twig' === substr($filename, -5)) {
+            $filename = substr($filename, 0, -5);
+        }
+
+        $extension = pathinfo($filename, PATHINFO_EXTENSION);
+
+        switch ($extension) {
+            case 'js':
+                return 'js';
+
+            case 'css':
+                return 'css';
+
+            case 'txt':
+                return false;
+
+            default:
+                return 'html';
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/Filter.php b/public/system/library/template/Twig/Filter.php
new file mode 100644
index 0000000..101d2e7
--- /dev/null
+++ b/public/system/library/template/Twig/Filter.php
@@ -0,0 +1,84 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Filter class is deprecated since version 1.12 and will be removed in 2.0. Use Twig_SimpleFilter instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a template filter.
+ *
+ * Use Twig_SimpleFilter instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+abstract class Twig_Filter implements Twig_FilterInterface, Twig_FilterCallableInterface
+{
+    protected $options;
+    protected $arguments = array();
+
+    public function __construct(array $options = array())
+    {
+        $this->options = array_merge(array(
+            'needs_environment' => false,
+            'needs_context' => false,
+            'pre_escape' => null,
+            'preserves_safety' => null,
+            'callable' => null,
+        ), $options);
+    }
+
+    public function setArguments($arguments)
+    {
+        $this->arguments = $arguments;
+    }
+
+    public function getArguments()
+    {
+        return $this->arguments;
+    }
+
+    public function needsEnvironment()
+    {
+        return $this->options['needs_environment'];
+    }
+
+    public function needsContext()
+    {
+        return $this->options['needs_context'];
+    }
+
+    public function getSafe(Twig_Node $filterArgs)
+    {
+        if (isset($this->options['is_safe'])) {
+            return $this->options['is_safe'];
+        }
+
+        if (isset($this->options['is_safe_callback'])) {
+            return call_user_func($this->options['is_safe_callback'], $filterArgs);
+        }
+    }
+
+    public function getPreservesSafety()
+    {
+        return $this->options['preserves_safety'];
+    }
+
+    public function getPreEscape()
+    {
+        return $this->options['pre_escape'];
+    }
+
+    public function getCallable()
+    {
+        return $this->options['callable'];
+    }
+}
diff --git a/public/system/library/template/Twig/Filter/Function.php b/public/system/library/template/Twig/Filter/Function.php
new file mode 100644
index 0000000..d679cab
--- /dev/null
+++ b/public/system/library/template/Twig/Filter/Function.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Filter_Function class is deprecated since version 1.12 and will be removed in 2.0. Use Twig_SimpleFilter instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a function template filter.
+ *
+ * Use Twig_SimpleFilter instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Filter_Function extends Twig_Filter
+{
+    protected $function;
+
+    public function __construct($function, array $options = array())
+    {
+        $options['callable'] = $function;
+
+        parent::__construct($options);
+
+        $this->function = $function;
+    }
+
+    public function compile()
+    {
+        return $this->function;
+    }
+}
diff --git a/public/system/library/template/Twig/Filter/Method.php b/public/system/library/template/Twig/Filter/Method.php
new file mode 100644
index 0000000..655aab4
--- /dev/null
+++ b/public/system/library/template/Twig/Filter/Method.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Filter_Method class is deprecated since version 1.12 and will be removed in 2.0. Use Twig_SimpleFilter instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a method template filter.
+ *
+ * Use Twig_SimpleFilter instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Filter_Method extends Twig_Filter
+{
+    protected $extension;
+    protected $method;
+
+    public function __construct(Twig_ExtensionInterface $extension, $method, array $options = array())
+    {
+        $options['callable'] = array($extension, $method);
+
+        parent::__construct($options);
+
+        $this->extension = $extension;
+        $this->method = $method;
+    }
+
+    public function compile()
+    {
+        return sprintf('$this->env->getExtension(\'%s\')->%s', $this->extension->getName(), $this->method);
+    }
+}
diff --git a/public/system/library/template/Twig/Filter/Node.php b/public/system/library/template/Twig/Filter/Node.php
new file mode 100644
index 0000000..a922f50
--- /dev/null
+++ b/public/system/library/template/Twig/Filter/Node.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Filter_Node class is deprecated since version 1.12 and will be removed in 2.0. Use Twig_SimpleFilter instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a template filter as a node.
+ *
+ * Use Twig_SimpleFilter instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Filter_Node extends Twig_Filter
+{
+    protected $class;
+
+    public function __construct($class, array $options = array())
+    {
+        parent::__construct($options);
+
+        $this->class = $class;
+    }
+
+    public function getClass()
+    {
+        return $this->class;
+    }
+
+    public function compile()
+    {
+    }
+}
diff --git a/public/system/library/template/Twig/FilterCallableInterface.php b/public/system/library/template/Twig/FilterCallableInterface.php
new file mode 100644
index 0000000..5679861
--- /dev/null
+++ b/public/system/library/template/Twig/FilterCallableInterface.php
@@ -0,0 +1,24 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a callable template filter.
+ *
+ * Use Twig_SimpleFilter instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_FilterCallableInterface
+{
+    public function getCallable();
+}
diff --git a/public/system/library/template/Twig/FilterInterface.php b/public/system/library/template/Twig/FilterInterface.php
new file mode 100644
index 0000000..6b0be0e
--- /dev/null
+++ b/public/system/library/template/Twig/FilterInterface.php
@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template filter.
+ *
+ * Use Twig_SimpleFilter instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_FilterInterface
+{
+    /**
+     * Compiles a filter.
+     *
+     * @return string The PHP code for the filter
+     */
+    public function compile();
+
+    public function needsEnvironment();
+
+    public function needsContext();
+
+    public function getSafe(Twig_Node $filterArgs);
+
+    public function getPreservesSafety();
+
+    public function getPreEscape();
+
+    public function setArguments($arguments);
+
+    public function getArguments();
+}
diff --git a/public/system/library/template/Twig/Function.php b/public/system/library/template/Twig/Function.php
new file mode 100644
index 0000000..9fc76a8
--- /dev/null
+++ b/public/system/library/template/Twig/Function.php
@@ -0,0 +1,74 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Function class is deprecated since version 1.12 and will be removed in 2.0. Use Twig_SimpleFunction instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a template function.
+ *
+ * Use Twig_SimpleFunction instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+abstract class Twig_Function implements Twig_FunctionInterface, Twig_FunctionCallableInterface
+{
+    protected $options;
+    protected $arguments = array();
+
+    public function __construct(array $options = array())
+    {
+        $this->options = array_merge(array(
+            'needs_environment' => false,
+            'needs_context' => false,
+            'callable' => null,
+        ), $options);
+    }
+
+    public function setArguments($arguments)
+    {
+        $this->arguments = $arguments;
+    }
+
+    public function getArguments()
+    {
+        return $this->arguments;
+    }
+
+    public function needsEnvironment()
+    {
+        return $this->options['needs_environment'];
+    }
+
+    public function needsContext()
+    {
+        return $this->options['needs_context'];
+    }
+
+    public function getSafe(Twig_Node $functionArgs)
+    {
+        if (isset($this->options['is_safe'])) {
+            return $this->options['is_safe'];
+        }
+
+        if (isset($this->options['is_safe_callback'])) {
+            return call_user_func($this->options['is_safe_callback'], $functionArgs);
+        }
+
+        return array();
+    }
+
+    public function getCallable()
+    {
+        return $this->options['callable'];
+    }
+}
diff --git a/public/system/library/template/Twig/Function/Function.php b/public/system/library/template/Twig/Function/Function.php
new file mode 100644
index 0000000..ae83e15
--- /dev/null
+++ b/public/system/library/template/Twig/Function/Function.php
@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2010 Arnaud Le Blanc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Function_Function class is deprecated since version 1.12 and will be removed in 2.0. Use Twig_SimpleFunction instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a function template function.
+ *
+ * Use Twig_SimpleFunction instead.
+ *
+ * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Function_Function extends Twig_Function
+{
+    protected $function;
+
+    public function __construct($function, array $options = array())
+    {
+        $options['callable'] = $function;
+
+        parent::__construct($options);
+
+        $this->function = $function;
+    }
+
+    public function compile()
+    {
+        return $this->function;
+    }
+}
diff --git a/public/system/library/template/Twig/Function/Method.php b/public/system/library/template/Twig/Function/Method.php
new file mode 100644
index 0000000..ba9945e
--- /dev/null
+++ b/public/system/library/template/Twig/Function/Method.php
@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2010 Arnaud Le Blanc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Function_Method class is deprecated since version 1.12 and will be removed in 2.0. Use Twig_SimpleFunction instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a method template function.
+ *
+ * Use Twig_SimpleFunction instead.
+ *
+ * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Function_Method extends Twig_Function
+{
+    protected $extension;
+    protected $method;
+
+    public function __construct(Twig_ExtensionInterface $extension, $method, array $options = array())
+    {
+        $options['callable'] = array($extension, $method);
+
+        parent::__construct($options);
+
+        $this->extension = $extension;
+        $this->method = $method;
+    }
+
+    public function compile()
+    {
+        return sprintf('$this->env->getExtension(\'%s\')->%s', $this->extension->getName(), $this->method);
+    }
+}
diff --git a/public/system/library/template/Twig/Function/Node.php b/public/system/library/template/Twig/Function/Node.php
new file mode 100644
index 0000000..118b0ba
--- /dev/null
+++ b/public/system/library/template/Twig/Function/Node.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Function_Node class is deprecated since version 1.12 and will be removed in 2.0. Use Twig_SimpleFunction instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a template function as a node.
+ *
+ * Use Twig_SimpleFunction instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Function_Node extends Twig_Function
+{
+    protected $class;
+
+    public function __construct($class, array $options = array())
+    {
+        parent::__construct($options);
+
+        $this->class = $class;
+    }
+
+    public function getClass()
+    {
+        return $this->class;
+    }
+
+    public function compile()
+    {
+    }
+}
diff --git a/public/system/library/template/Twig/FunctionCallableInterface.php b/public/system/library/template/Twig/FunctionCallableInterface.php
new file mode 100644
index 0000000..87d795e
--- /dev/null
+++ b/public/system/library/template/Twig/FunctionCallableInterface.php
@@ -0,0 +1,24 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a callable template function.
+ *
+ * Use Twig_SimpleFunction instead.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_FunctionCallableInterface
+{
+    public function getCallable();
+}
diff --git a/public/system/library/template/Twig/FunctionInterface.php b/public/system/library/template/Twig/FunctionInterface.php
new file mode 100644
index 0000000..f449234
--- /dev/null
+++ b/public/system/library/template/Twig/FunctionInterface.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ * (c) 2010 Arnaud Le Blanc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template function.
+ *
+ * Use Twig_SimpleFunction instead.
+ *
+ * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_FunctionInterface
+{
+    /**
+     * Compiles a function.
+     *
+     * @return string The PHP code for the function
+     */
+    public function compile();
+
+    public function needsEnvironment();
+
+    public function needsContext();
+
+    public function getSafe(Twig_Node $filterArgs);
+
+    public function setArguments($arguments);
+
+    public function getArguments();
+}
diff --git a/public/system/library/template/Twig/Lexer.php b/public/system/library/template/Twig/Lexer.php
new file mode 100644
index 0000000..dd79873
--- /dev/null
+++ b/public/system/library/template/Twig/Lexer.php
@@ -0,0 +1,411 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Lexes a template string.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Lexer implements Twig_LexerInterface
+{
+    protected $tokens;
+    protected $code;
+    protected $cursor;
+    protected $lineno;
+    protected $end;
+    protected $state;
+    protected $states;
+    protected $brackets;
+    protected $env;
+    protected $filename;
+    protected $options;
+    protected $regexes;
+    protected $position;
+    protected $positions;
+    protected $currentVarBlockLine;
+
+    const STATE_DATA = 0;
+    const STATE_BLOCK = 1;
+    const STATE_VAR = 2;
+    const STATE_STRING = 3;
+    const STATE_INTERPOLATION = 4;
+
+    const REGEX_NAME = '/[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*/A';
+    const REGEX_NUMBER = '/[0-9]+(?:\.[0-9]+)?/A';
+    const REGEX_STRING = '/"([^#"\\\\]*(?:\\\\.[^#"\\\\]*)*)"|\'([^\'\\\\]*(?:\\\\.[^\'\\\\]*)*)\'/As';
+    const REGEX_DQ_STRING_DELIM = '/"/A';
+    const REGEX_DQ_STRING_PART = '/[^#"\\\\]*(?:(?:\\\\.|#(?!\{))[^#"\\\\]*)*/As';
+    const PUNCTUATION = '()[]{}?:.,|';
+
+    public function __construct(Twig_Environment $env, array $options = array())
+    {
+        $this->env = $env;
+
+        $this->options = array_merge(array(
+            'tag_comment' => array('{#', '#}'),
+            'tag_block' => array('{%', '%}'),
+            'tag_variable' => array('{{', '}}'),
+            'whitespace_trim' => '-',
+            'interpolation' => array('#{', '}'),
+        ), $options);
+
+        $this->regexes = array(
+            'lex_var' => '/\s*'.preg_quote($this->options['whitespace_trim'].$this->options['tag_variable'][1], '/').'\s*|\s*'.preg_quote($this->options['tag_variable'][1], '/').'/A',
+            'lex_block' => '/\s*(?:'.preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '/').'\s*|\s*'.preg_quote($this->options['tag_block'][1], '/').')\n?/A',
+            'lex_raw_data' => '/('.preg_quote($this->options['tag_block'][0].$this->options['whitespace_trim'], '/').'|'.preg_quote($this->options['tag_block'][0], '/').')\s*(?:end%s)\s*(?:'.preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '/').'\s*|\s*'.preg_quote($this->options['tag_block'][1], '/').')/s',
+            'operator' => $this->getOperatorRegex(),
+            'lex_comment' => '/(?:'.preg_quote($this->options['whitespace_trim'], '/').preg_quote($this->options['tag_comment'][1], '/').'\s*|'.preg_quote($this->options['tag_comment'][1], '/').')\n?/s',
+            'lex_block_raw' => '/\s*(raw|verbatim)\s*(?:'.preg_quote($this->options['whitespace_trim'].$this->options['tag_block'][1], '/').'\s*|\s*'.preg_quote($this->options['tag_block'][1], '/').')/As',
+            'lex_block_line' => '/\s*line\s+(\d+)\s*'.preg_quote($this->options['tag_block'][1], '/').'/As',
+            'lex_tokens_start' => '/('.preg_quote($this->options['tag_variable'][0], '/').'|'.preg_quote($this->options['tag_block'][0], '/').'|'.preg_quote($this->options['tag_comment'][0], '/').')('.preg_quote($this->options['whitespace_trim'], '/').')?/s',
+            'interpolation_start' => '/'.preg_quote($this->options['interpolation'][0], '/').'\s*/A',
+            'interpolation_end' => '/\s*'.preg_quote($this->options['interpolation'][1], '/').'/A',
+        );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function tokenize($code, $filename = null)
+    {
+        if (function_exists('mb_internal_encoding') && ((int) ini_get('mbstring.func_overload')) & 2) {
+            $mbEncoding = mb_internal_encoding();
+            mb_internal_encoding('ASCII');
+        } else {
+            $mbEncoding = null;
+        }
+
+        $this->code = str_replace(array("\r\n", "\r"), "\n", $code);
+        $this->filename = $filename;
+        $this->cursor = 0;
+        $this->lineno = 1;
+        $this->end = strlen($this->code);
+        $this->tokens = array();
+        $this->state = self::STATE_DATA;
+        $this->states = array();
+        $this->brackets = array();
+        $this->position = -1;
+
+        // find all token starts in one go
+        preg_match_all($this->regexes['lex_tokens_start'], $this->code, $matches, PREG_OFFSET_CAPTURE);
+        $this->positions = $matches;
+
+        while ($this->cursor < $this->end) {
+            // dispatch to the lexing functions depending
+            // on the current state
+            switch ($this->state) {
+                case self::STATE_DATA:
+                    $this->lexData();
+                    break;
+
+                case self::STATE_BLOCK:
+                    $this->lexBlock();
+                    break;
+
+                case self::STATE_VAR:
+                    $this->lexVar();
+                    break;
+
+                case self::STATE_STRING:
+                    $this->lexString();
+                    break;
+
+                case self::STATE_INTERPOLATION:
+                    $this->lexInterpolation();
+                    break;
+            }
+        }
+
+        $this->pushToken(Twig_Token::EOF_TYPE);
+
+        if (!empty($this->brackets)) {
+            list($expect, $lineno) = array_pop($this->brackets);
+            throw new Twig_Error_Syntax(sprintf('Unclosed "%s".', $expect), $lineno, $this->filename);
+        }
+
+        if ($mbEncoding) {
+            mb_internal_encoding($mbEncoding);
+        }
+
+        return new Twig_TokenStream($this->tokens, $this->filename);
+    }
+
+    protected function lexData()
+    {
+        // if no matches are left we return the rest of the template as simple text token
+        if ($this->position == count($this->positions[0]) - 1) {
+            $this->pushToken(Twig_Token::TEXT_TYPE, substr($this->code, $this->cursor));
+            $this->cursor = $this->end;
+
+            return;
+        }
+
+        // Find the first token after the current cursor
+        $position = $this->positions[0][++$this->position];
+        while ($position[1] < $this->cursor) {
+            if ($this->position == count($this->positions[0]) - 1) {
+                return;
+            }
+            $position = $this->positions[0][++$this->position];
+        }
+
+        // push the template text first
+        $text = $textContent = substr($this->code, $this->cursor, $position[1] - $this->cursor);
+        if (isset($this->positions[2][$this->position][0])) {
+            $text = rtrim($text);
+        }
+        $this->pushToken(Twig_Token::TEXT_TYPE, $text);
+        $this->moveCursor($textContent.$position[0]);
+
+        switch ($this->positions[1][$this->position][0]) {
+            case $this->options['tag_comment'][0]:
+                $this->lexComment();
+                break;
+
+            case $this->options['tag_block'][0]:
+                // raw data?
+                if (preg_match($this->regexes['lex_block_raw'], $this->code, $match, null, $this->cursor)) {
+                    $this->moveCursor($match[0]);
+                    $this->lexRawData($match[1]);
+                // {% line \d+ %}
+                } elseif (preg_match($this->regexes['lex_block_line'], $this->code, $match, null, $this->cursor)) {
+                    $this->moveCursor($match[0]);
+                    $this->lineno = (int) $match[1];
+                } else {
+                    $this->pushToken(Twig_Token::BLOCK_START_TYPE);
+                    $this->pushState(self::STATE_BLOCK);
+                    $this->currentVarBlockLine = $this->lineno;
+                }
+                break;
+
+            case $this->options['tag_variable'][0]:
+                $this->pushToken(Twig_Token::VAR_START_TYPE);
+                $this->pushState(self::STATE_VAR);
+                $this->currentVarBlockLine = $this->lineno;
+                break;
+        }
+    }
+
+    protected function lexBlock()
+    {
+        if (empty($this->brackets) && preg_match($this->regexes['lex_block'], $this->code, $match, null, $this->cursor)) {
+            $this->pushToken(Twig_Token::BLOCK_END_TYPE);
+            $this->moveCursor($match[0]);
+            $this->popState();
+        } else {
+            $this->lexExpression();
+        }
+    }
+
+    protected function lexVar()
+    {
+        if (empty($this->brackets) && preg_match($this->regexes['lex_var'], $this->code, $match, null, $this->cursor)) {
+            $this->pushToken(Twig_Token::VAR_END_TYPE);
+            $this->moveCursor($match[0]);
+            $this->popState();
+        } else {
+            $this->lexExpression();
+        }
+    }
+
+    protected function lexExpression()
+    {
+        // whitespace
+        if (preg_match('/\s+/A', $this->code, $match, null, $this->cursor)) {
+            $this->moveCursor($match[0]);
+
+            if ($this->cursor >= $this->end) {
+                throw new Twig_Error_Syntax(sprintf('Unclosed "%s".', $this->state === self::STATE_BLOCK ? 'block' : 'variable'), $this->currentVarBlockLine, $this->filename);
+            }
+        }
+
+        // operators
+        if (preg_match($this->regexes['operator'], $this->code, $match, null, $this->cursor)) {
+            $this->pushToken(Twig_Token::OPERATOR_TYPE, preg_replace('/\s+/', ' ', $match[0]));
+            $this->moveCursor($match[0]);
+        }
+        // names
+        elseif (preg_match(self::REGEX_NAME, $this->code, $match, null, $this->cursor)) {
+            $this->pushToken(Twig_Token::NAME_TYPE, $match[0]);
+            $this->moveCursor($match[0]);
+        }
+        // numbers
+        elseif (preg_match(self::REGEX_NUMBER, $this->code, $match, null, $this->cursor)) {
+            $number = (float) $match[0];  // floats
+            if (ctype_digit($match[0]) && $number <= PHP_INT_MAX) {
+                $number = (int) $match[0]; // integers lower than the maximum
+            }
+            $this->pushToken(Twig_Token::NUMBER_TYPE, $number);
+            $this->moveCursor($match[0]);
+        }
+        // punctuation
+        elseif (false !== strpos(self::PUNCTUATION, $this->code[$this->cursor])) {
+            // opening bracket
+            if (false !== strpos('([{', $this->code[$this->cursor])) {
+                $this->brackets[] = array($this->code[$this->cursor], $this->lineno);
+            }
+            // closing bracket
+            elseif (false !== strpos(')]}', $this->code[$this->cursor])) {
+                if (empty($this->brackets)) {
+                    throw new Twig_Error_Syntax(sprintf('Unexpected "%s".', $this->code[$this->cursor]), $this->lineno, $this->filename);
+                }
+
+                list($expect, $lineno) = array_pop($this->brackets);
+                if ($this->code[$this->cursor] != strtr($expect, '([{', ')]}')) {
+                    throw new Twig_Error_Syntax(sprintf('Unclosed "%s".', $expect), $lineno, $this->filename);
+                }
+            }
+
+            $this->pushToken(Twig_Token::PUNCTUATION_TYPE, $this->code[$this->cursor]);
+            ++$this->cursor;
+        }
+        // strings
+        elseif (preg_match(self::REGEX_STRING, $this->code, $match, null, $this->cursor)) {
+            $this->pushToken(Twig_Token::STRING_TYPE, stripcslashes(substr($match[0], 1, -1)));
+            $this->moveCursor($match[0]);
+        }
+        // opening double quoted string
+        elseif (preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, null, $this->cursor)) {
+            $this->brackets[] = array('"', $this->lineno);
+            $this->pushState(self::STATE_STRING);
+            $this->moveCursor($match[0]);
+        }
+        // unlexable
+        else {
+            throw new Twig_Error_Syntax(sprintf('Unexpected character "%s".', $this->code[$this->cursor]), $this->lineno, $this->filename);
+        }
+    }
+
+    protected function lexRawData($tag)
+    {
+        if ('raw' === $tag) {
+            @trigger_error(sprintf('Twig Tag "raw" is deprecated since version 1.21. Use "verbatim" instead in %s at line %d.', $this->filename, $this->lineno), E_USER_DEPRECATED);
+        }
+
+        if (!preg_match(str_replace('%s', $tag, $this->regexes['lex_raw_data']), $this->code, $match, PREG_OFFSET_CAPTURE, $this->cursor)) {
+            throw new Twig_Error_Syntax(sprintf('Unexpected end of file: Unclosed "%s" block.', $tag), $this->lineno, $this->filename);
+        }
+
+        $text = substr($this->code, $this->cursor, $match[0][1] - $this->cursor);
+        $this->moveCursor($text.$match[0][0]);
+
+        if (false !== strpos($match[1][0], $this->options['whitespace_trim'])) {
+            $text = rtrim($text);
+        }
+
+        $this->pushToken(Twig_Token::TEXT_TYPE, $text);
+    }
+
+    protected function lexComment()
+    {
+        if (!preg_match($this->regexes['lex_comment'], $this->code, $match, PREG_OFFSET_CAPTURE, $this->cursor)) {
+            throw new Twig_Error_Syntax('Unclosed comment.', $this->lineno, $this->filename);
+        }
+
+        $this->moveCursor(substr($this->code, $this->cursor, $match[0][1] - $this->cursor).$match[0][0]);
+    }
+
+    protected function lexString()
+    {
+        if (preg_match($this->regexes['interpolation_start'], $this->code, $match, null, $this->cursor)) {
+            $this->brackets[] = array($this->options['interpolation'][0], $this->lineno);
+            $this->pushToken(Twig_Token::INTERPOLATION_START_TYPE);
+            $this->moveCursor($match[0]);
+            $this->pushState(self::STATE_INTERPOLATION);
+        } elseif (preg_match(self::REGEX_DQ_STRING_PART, $this->code, $match, null, $this->cursor) && strlen($match[0]) > 0) {
+            $this->pushToken(Twig_Token::STRING_TYPE, stripcslashes($match[0]));
+            $this->moveCursor($match[0]);
+        } elseif (preg_match(self::REGEX_DQ_STRING_DELIM, $this->code, $match, null, $this->cursor)) {
+            list($expect, $lineno) = array_pop($this->brackets);
+            if ($this->code[$this->cursor] != '"') {
+                throw new Twig_Error_Syntax(sprintf('Unclosed "%s".', $expect), $lineno, $this->filename);
+            }
+
+            $this->popState();
+            ++$this->cursor;
+        }
+    }
+
+    protected function lexInterpolation()
+    {
+        $bracket = end($this->brackets);
+        if ($this->options['interpolation'][0] === $bracket[0] && preg_match($this->regexes['interpolation_end'], $this->code, $match, null, $this->cursor)) {
+            array_pop($this->brackets);
+            $this->pushToken(Twig_Token::INTERPOLATION_END_TYPE);
+            $this->moveCursor($match[0]);
+            $this->popState();
+        } else {
+            $this->lexExpression();
+        }
+    }
+
+    protected function pushToken($type, $value = '')
+    {
+        // do not push empty text tokens
+        if (Twig_Token::TEXT_TYPE === $type && '' === $value) {
+            return;
+        }
+
+        $this->tokens[] = new Twig_Token($type, $value, $this->lineno);
+    }
+
+    protected function moveCursor($text)
+    {
+        $this->cursor += strlen($text);
+        $this->lineno += substr_count($text, "\n");
+    }
+
+    protected function getOperatorRegex()
+    {
+        $operators = array_merge(
+            array('='),
+            array_keys($this->env->getUnaryOperators()),
+            array_keys($this->env->getBinaryOperators())
+        );
+
+        $operators = array_combine($operators, array_map('strlen', $operators));
+        arsort($operators);
+
+        $regex = array();
+        foreach ($operators as $operator => $length) {
+            // an operator that ends with a character must be followed by
+            // a whitespace or a parenthesis
+            if (ctype_alpha($operator[$length - 1])) {
+                $r = preg_quote($operator, '/').'(?=[\s()])';
+            } else {
+                $r = preg_quote($operator, '/');
+            }
+
+            // an operator with a space can be any amount of whitespaces
+            $r = preg_replace('/\s+/', '\s+', $r);
+
+            $regex[] = $r;
+        }
+
+        return '/'.implode('|', $regex).'/A';
+    }
+
+    protected function pushState($state)
+    {
+        $this->states[] = $this->state;
+        $this->state = $state;
+    }
+
+    protected function popState()
+    {
+        if (0 === count($this->states)) {
+            throw new Exception('Cannot pop state without a previous state');
+        }
+
+        $this->state = array_pop($this->states);
+    }
+}
diff --git a/public/system/library/template/Twig/LexerInterface.php b/public/system/library/template/Twig/LexerInterface.php
new file mode 100644
index 0000000..24a9478
--- /dev/null
+++ b/public/system/library/template/Twig/LexerInterface.php
@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by lexer classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 3.0)
+ */
+interface Twig_LexerInterface
+{
+    /**
+     * Tokenizes a source code.
+     *
+     * @param string $code     The source code
+     * @param string $filename A unique identifier for the source code
+     *
+     * @return Twig_TokenStream A token stream instance
+     *
+     * @throws Twig_Error_Syntax When the code is syntactically wrong
+     */
+    public function tokenize($code, $filename = null);
+}
diff --git a/public/system/library/template/Twig/Loader/Array.php b/public/system/library/template/Twig/Loader/Array.php
new file mode 100644
index 0000000..90221d5
--- /dev/null
+++ b/public/system/library/template/Twig/Loader/Array.php
@@ -0,0 +1,95 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Loads a template from an array.
+ *
+ * When using this loader with a cache mechanism, you should know that a new cache
+ * key is generated each time a template content "changes" (the cache key being the
+ * source code of the template). If you don't want to see your cache grows out of
+ * control, you need to take care of clearing the old cache file by yourself.
+ *
+ * This loader should only be used for unit testing.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Loader_Array implements Twig_LoaderInterface, Twig_ExistsLoaderInterface
+{
+    protected $templates = array();
+
+    /**
+     * Constructor.
+     *
+     * @param array $templates An array of templates (keys are the names, and values are the source code)
+     */
+    public function __construct(array $templates)
+    {
+        $this->templates = $templates;
+    }
+
+    /**
+     * Adds or overrides a template.
+     *
+     * @param string $name     The template name
+     * @param string $template The template source
+     */
+    public function setTemplate($name, $template)
+    {
+        $this->templates[(string) $name] = $template;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSource($name)
+    {
+        $name = (string) $name;
+        if (!isset($this->templates[$name])) {
+            throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));
+        }
+
+        return $this->templates[$name];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function exists($name)
+    {
+        return isset($this->templates[(string) $name]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCacheKey($name)
+    {
+        $name = (string) $name;
+        if (!isset($this->templates[$name])) {
+            throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));
+        }
+
+        return $this->templates[$name];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isFresh($name, $time)
+    {
+        $name = (string) $name;
+        if (!isset($this->templates[$name])) {
+            throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));
+        }
+
+        return true;
+    }
+}
diff --git a/public/system/library/template/Twig/Loader/Chain.php b/public/system/library/template/Twig/Loader/Chain.php
new file mode 100644
index 0000000..81d57ad
--- /dev/null
+++ b/public/system/library/template/Twig/Loader/Chain.php
@@ -0,0 +1,138 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Loads templates from other loaders.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Loader_Chain implements Twig_LoaderInterface, Twig_ExistsLoaderInterface
+{
+    private $hasSourceCache = array();
+    protected $loaders = array();
+
+    /**
+     * Constructor.
+     *
+     * @param Twig_LoaderInterface[] $loaders An array of loader instances
+     */
+    public function __construct(array $loaders = array())
+    {
+        foreach ($loaders as $loader) {
+            $this->addLoader($loader);
+        }
+    }
+
+    /**
+     * Adds a loader instance.
+     *
+     * @param Twig_LoaderInterface $loader A Loader instance
+     */
+    public function addLoader(Twig_LoaderInterface $loader)
+    {
+        $this->loaders[] = $loader;
+        $this->hasSourceCache = array();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSource($name)
+    {
+        $exceptions = array();
+        foreach ($this->loaders as $loader) {
+            if ($loader instanceof Twig_ExistsLoaderInterface && !$loader->exists($name)) {
+                continue;
+            }
+
+            try {
+                return $loader->getSource($name);
+            } catch (Twig_Error_Loader $e) {
+                $exceptions[] = $e->getMessage();
+            }
+        }
+
+        throw new Twig_Error_Loader(sprintf('Template "%s" is not defined%s.', $name, $exceptions ? ' ('.implode(', ', $exceptions).')' : ''));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function exists($name)
+    {
+        $name = (string) $name;
+
+        if (isset($this->hasSourceCache[$name])) {
+            return $this->hasSourceCache[$name];
+        }
+
+        foreach ($this->loaders as $loader) {
+            if ($loader instanceof Twig_ExistsLoaderInterface) {
+                if ($loader->exists($name)) {
+                    return $this->hasSourceCache[$name] = true;
+                }
+
+                continue;
+            }
+
+            try {
+                $loader->getSource($name);
+
+                return $this->hasSourceCache[$name] = true;
+            } catch (Twig_Error_Loader $e) {
+            }
+        }
+
+        return $this->hasSourceCache[$name] = false;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCacheKey($name)
+    {
+        $exceptions = array();
+        foreach ($this->loaders as $loader) {
+            if ($loader instanceof Twig_ExistsLoaderInterface && !$loader->exists($name)) {
+                continue;
+            }
+
+            try {
+                return $loader->getCacheKey($name);
+            } catch (Twig_Error_Loader $e) {
+                $exceptions[] = get_class($loader).': '.$e->getMessage();
+            }
+        }
+
+        throw new Twig_Error_Loader(sprintf('Template "%s" is not defined%s.', $name, $exceptions ? ' ('.implode(', ', $exceptions).')' : ''));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isFresh($name, $time)
+    {
+        $exceptions = array();
+        foreach ($this->loaders as $loader) {
+            if ($loader instanceof Twig_ExistsLoaderInterface && !$loader->exists($name)) {
+                continue;
+            }
+
+            try {
+                return $loader->isFresh($name, $time);
+            } catch (Twig_Error_Loader $e) {
+                $exceptions[] = get_class($loader).': '.$e->getMessage();
+            }
+        }
+
+        throw new Twig_Error_Loader(sprintf('Template "%s" is not defined%s.', $name, $exceptions ? ' ('.implode(', ', $exceptions).')' : ''));
+    }
+}
diff --git a/public/system/library/template/Twig/Loader/Filesystem.php b/public/system/library/template/Twig/Loader/Filesystem.php
new file mode 100644
index 0000000..1bc75a1
--- /dev/null
+++ b/public/system/library/template/Twig/Loader/Filesystem.php
@@ -0,0 +1,260 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Loads template from the filesystem.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Loader_Filesystem implements Twig_LoaderInterface, Twig_ExistsLoaderInterface
+{
+    /** Identifier of the main namespace. */
+    const MAIN_NAMESPACE = '__main__';
+
+    protected $paths = array();
+    protected $cache = array();
+    protected $errorCache = array();
+
+    /**
+     * Constructor.
+     *
+     * @param string|array $paths A path or an array of paths where to look for templates
+     */
+    public function __construct($paths = array())
+    {
+        if ($paths) {
+            $this->setPaths($paths);
+        }
+    }
+
+    /**
+     * Returns the paths to the templates.
+     *
+     * @param string $namespace A path namespace
+     *
+     * @return array The array of paths where to look for templates
+     */
+    public function getPaths($namespace = self::MAIN_NAMESPACE)
+    {
+        return isset($this->paths[$namespace]) ? $this->paths[$namespace] : array();
+    }
+
+    /**
+     * Returns the path namespaces.
+     *
+     * The main namespace is always defined.
+     *
+     * @return array The array of defined namespaces
+     */
+    public function getNamespaces()
+    {
+        return array_keys($this->paths);
+    }
+
+    /**
+     * Sets the paths where templates are stored.
+     *
+     * @param string|array $paths     A path or an array of paths where to look for templates
+     * @param string       $namespace A path namespace
+     */
+    public function setPaths($paths, $namespace = self::MAIN_NAMESPACE)
+    {
+        if (!is_array($paths)) {
+            $paths = array($paths);
+        }
+
+        $this->paths[$namespace] = array();
+        foreach ($paths as $path) {
+            $this->addPath($path, $namespace);
+        }
+    }
+
+    /**
+     * Adds a path where templates are stored.
+     *
+     * @param string $path      A path where to look for templates
+     * @param string $namespace A path name
+     *
+     * @throws Twig_Error_Loader
+     */
+    public function addPath($path, $namespace = self::MAIN_NAMESPACE)
+    {
+        // invalidate the cache
+        $this->cache = $this->errorCache = array();
+
+        if (!is_dir($path)) {
+            throw new Twig_Error_Loader(sprintf('The "%s" directory does not exist.', $path));
+        }
+
+        $this->paths[$namespace][] = rtrim($path, '/\\');
+    }
+
+    /**
+     * Prepends a path where templates are stored.
+     *
+     * @param string $path      A path where to look for templates
+     * @param string $namespace A path name
+     *
+     * @throws Twig_Error_Loader
+     */
+    public function prependPath($path, $namespace = self::MAIN_NAMESPACE)
+    {
+        // invalidate the cache
+        $this->cache = $this->errorCache = array();
+
+        if (!is_dir($path)) {
+            throw new Twig_Error_Loader(sprintf('The "%s" directory does not exist.', $path));
+        }
+
+        $path = rtrim($path, '/\\');
+
+        if (!isset($this->paths[$namespace])) {
+            $this->paths[$namespace][] = $path;
+        } else {
+            array_unshift($this->paths[$namespace], $path);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSource($name)
+    {
+        return file_get_contents($this->findTemplate($name));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCacheKey($name)
+    {
+        return $this->findTemplate($name);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function exists($name)
+    {
+        $name = $this->normalizeName($name);
+
+        if (isset($this->cache[$name])) {
+            return true;
+        }
+
+        try {
+            return false !== $this->findTemplate($name, false);
+        } catch (Twig_Error_Loader $exception) {
+            return false;
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isFresh($name, $time)
+    {
+        return filemtime($this->findTemplate($name)) <= $time;
+    }
+
+    protected function findTemplate($name)
+    {
+        $throw = func_num_args() > 1 ? func_get_arg(1) : true;
+        $name = $this->normalizeName($name);
+
+        if (isset($this->cache[$name])) {
+            return $this->cache[$name];
+        }
+
+        if (isset($this->errorCache[$name])) {
+            if (!$throw) {
+                return false;
+            }
+
+            throw new Twig_Error_Loader($this->errorCache[$name]);
+        }
+
+        $this->validateName($name);
+
+        list($namespace, $shortname) = $this->parseName($name);
+
+        if (!isset($this->paths[$namespace])) {
+            $this->errorCache[$name] = sprintf('There are no registered paths for namespace "%s".', $namespace);
+
+            if (!$throw) {
+                return false;
+            }
+
+            throw new Twig_Error_Loader($this->errorCache[$name]);
+        }
+
+        foreach ($this->paths[$namespace] as $path) {
+            if (is_file($path.'/'.$shortname)) {
+                if (false !== $realpath = realpath($path.'/'.$shortname)) {
+                    return $this->cache[$name] = $realpath;
+                }
+
+                return $this->cache[$name] = $path.'/'.$shortname;
+            }
+        }
+
+        $this->errorCache[$name] = sprintf('Unable to find template "%s" (looked into: %s).', $name, implode(', ', $this->paths[$namespace]));
+
+        if (!$throw) {
+            return false;
+        }
+
+        throw new Twig_Error_Loader($this->errorCache[$name]);
+    }
+
+    protected function parseName($name, $default = self::MAIN_NAMESPACE)
+    {
+        if (isset($name[0]) && '@' == $name[0]) {
+            if (false === $pos = strpos($name, '/')) {
+                throw new Twig_Error_Loader(sprintf('Malformed namespaced template name "%s" (expecting "@namespace/template_name").', $name));
+            }
+
+            $namespace = substr($name, 1, $pos - 1);
+            $shortname = substr($name, $pos + 1);
+
+            return array($namespace, $shortname);
+        }
+
+        return array($default, $name);
+    }
+
+    protected function normalizeName($name)
+    {
+        return preg_replace('#/{2,}#', '/', str_replace('\\', '/', (string) $name));
+    }
+
+    protected function validateName($name)
+    {
+        if (false !== strpos($name, "\0")) {
+            throw new Twig_Error_Loader('A template name cannot contain NUL bytes.');
+        }
+
+        $name = ltrim($name, '/');
+        $parts = explode('/', $name);
+        $level = 0;
+        foreach ($parts as $part) {
+            if ('..' === $part) {
+                --$level;
+            } elseif ('.' !== $part) {
+                ++$level;
+            }
+
+            if ($level < 0) {
+                throw new Twig_Error_Loader(sprintf('Looks like you try to load a template outside configured directories (%s).', $name));
+            }
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/Loader/String.php b/public/system/library/template/Twig/Loader/String.php
new file mode 100644
index 0000000..00f507a
--- /dev/null
+++ b/public/system/library/template/Twig/Loader/String.php
@@ -0,0 +1,63 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Loader_String class is deprecated since version 1.18.1 and will be removed in 2.0. Use Twig_Loader_Array instead or Twig_Environment::createTemplate().', E_USER_DEPRECATED);
+
+/**
+ * Loads a template from a string.
+ *
+ * This loader should NEVER be used. It only exists for Twig internal purposes.
+ *
+ * When using this loader with a cache mechanism, you should know that a new cache
+ * key is generated each time a template content "changes" (the cache key being the
+ * source code of the template). If you don't want to see your cache grows out of
+ * control, you need to take care of clearing the old cache file by yourself.
+ *
+ * @deprecated since 1.18.1 (to be removed in 2.0)
+ *
+ * @internal
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Loader_String implements Twig_LoaderInterface, Twig_ExistsLoaderInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function getSource($name)
+    {
+        return $name;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function exists($name)
+    {
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCacheKey($name)
+    {
+        return $name;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isFresh($name, $time)
+    {
+        return true;
+    }
+}
diff --git a/public/system/library/template/Twig/LoaderInterface.php b/public/system/library/template/Twig/LoaderInterface.php
new file mode 100644
index 0000000..544ea4e
--- /dev/null
+++ b/public/system/library/template/Twig/LoaderInterface.php
@@ -0,0 +1,53 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface all loaders must implement.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_LoaderInterface
+{
+    /**
+     * Gets the source code of a template, given its name.
+     *
+     * @param string $name The name of the template to load
+     *
+     * @return string The template source code
+     *
+     * @throws Twig_Error_Loader When $name is not found
+     */
+    public function getSource($name);
+
+    /**
+     * Gets the cache key to use for the cache for a given template name.
+     *
+     * @param string $name The name of the template to load
+     *
+     * @return string The cache key
+     *
+     * @throws Twig_Error_Loader When $name is not found
+     */
+    public function getCacheKey($name);
+
+    /**
+     * Returns true if the template is still fresh.
+     *
+     * @param string $name The template name
+     * @param int    $time Timestamp of the last modification time of the
+     *                     cached template
+     *
+     * @return bool true if the template is fresh, false otherwise
+     *
+     * @throws Twig_Error_Loader When $name is not found
+     */
+    public function isFresh($name, $time);
+}
diff --git a/public/system/library/template/Twig/Markup.php b/public/system/library/template/Twig/Markup.php
new file mode 100644
index 0000000..69871fc
--- /dev/null
+++ b/public/system/library/template/Twig/Markup.php
@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Marks a content as safe.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Markup implements Countable
+{
+    protected $content;
+    protected $charset;
+
+    public function __construct($content, $charset)
+    {
+        $this->content = (string) $content;
+        $this->charset = $charset;
+    }
+
+    public function __toString()
+    {
+        return $this->content;
+    }
+
+    public function count()
+    {
+        return function_exists('mb_get_info') ? mb_strlen($this->content, $this->charset) : strlen($this->content);
+    }
+}
diff --git a/public/system/library/template/Twig/Node.php b/public/system/library/template/Twig/Node.php
new file mode 100644
index 0000000..3065f67
--- /dev/null
+++ b/public/system/library/template/Twig/Node.php
@@ -0,0 +1,231 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a node in the AST.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node implements Twig_NodeInterface
+{
+    protected $nodes;
+    protected $attributes;
+    protected $lineno;
+    protected $tag;
+
+    /**
+     * Constructor.
+     *
+     * The nodes are automatically made available as properties ($this->node).
+     * The attributes are automatically made available as array items ($this['name']).
+     *
+     * @param array  $nodes      An array of named nodes
+     * @param array  $attributes An array of attributes (should not be nodes)
+     * @param int    $lineno     The line number
+     * @param string $tag        The tag name associated with the Node
+     */
+    public function __construct(array $nodes = array(), array $attributes = array(), $lineno = 0, $tag = null)
+    {
+        $this->nodes = $nodes;
+        $this->attributes = $attributes;
+        $this->lineno = $lineno;
+        $this->tag = $tag;
+    }
+
+    public function __toString()
+    {
+        $attributes = array();
+        foreach ($this->attributes as $name => $value) {
+            $attributes[] = sprintf('%s: %s', $name, str_replace("\n", '', var_export($value, true)));
+        }
+
+        $repr = array(get_class($this).'('.implode(', ', $attributes));
+
+        if (count($this->nodes)) {
+            foreach ($this->nodes as $name => $node) {
+                $len = strlen($name) + 4;
+                $noderepr = array();
+                foreach (explode("\n", (string) $node) as $line) {
+                    $noderepr[] = str_repeat(' ', $len).$line;
+                }
+
+                $repr[] = sprintf('  %s: %s', $name, ltrim(implode("\n", $noderepr)));
+            }
+
+            $repr[] = ')';
+        } else {
+            $repr[0] .= ')';
+        }
+
+        return implode("\n", $repr);
+    }
+
+    /**
+     * @deprecated since 1.16.1 (to be removed in 2.0)
+     */
+    public function toXml($asDom = false)
+    {
+        @trigger_error(sprintf('%s is deprecated since version 1.16.1 and will be removed in 2.0.', __METHOD__), E_USER_DEPRECATED);
+
+        $dom = new DOMDocument('1.0', 'UTF-8');
+        $dom->formatOutput = true;
+        $dom->appendChild($xml = $dom->createElement('twig'));
+
+        $xml->appendChild($node = $dom->createElement('node'));
+        $node->setAttribute('class', get_class($this));
+
+        foreach ($this->attributes as $name => $value) {
+            $node->appendChild($attribute = $dom->createElement('attribute'));
+            $attribute->setAttribute('name', $name);
+            $attribute->appendChild($dom->createTextNode($value));
+        }
+
+        foreach ($this->nodes as $name => $n) {
+            if (null === $n) {
+                continue;
+            }
+
+            $child = $n->toXml(true)->getElementsByTagName('node')->item(0);
+            $child = $dom->importNode($child, true);
+            $child->setAttribute('name', $name);
+
+            $node->appendChild($child);
+        }
+
+        return $asDom ? $dom : $dom->saveXML();
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        foreach ($this->nodes as $node) {
+            $node->compile($compiler);
+        }
+    }
+
+    public function getLine()
+    {
+        return $this->lineno;
+    }
+
+    public function getNodeTag()
+    {
+        return $this->tag;
+    }
+
+    /**
+     * Returns true if the attribute is defined.
+     *
+     * @param string $name The attribute name
+     *
+     * @return bool true if the attribute is defined, false otherwise
+     */
+    public function hasAttribute($name)
+    {
+        return array_key_exists($name, $this->attributes);
+    }
+
+    /**
+     * Gets an attribute value by name.
+     *
+     * @param string $name
+     *
+     * @return mixed
+     */
+    public function getAttribute($name)
+    {
+        if (!array_key_exists($name, $this->attributes)) {
+            throw new LogicException(sprintf('Attribute "%s" does not exist for Node "%s".', $name, get_class($this)));
+        }
+
+        return $this->attributes[$name];
+    }
+
+    /**
+     * Sets an attribute by name to a value.
+     *
+     * @param string $name
+     * @param mixed  $value
+     */
+    public function setAttribute($name, $value)
+    {
+        $this->attributes[$name] = $value;
+    }
+
+    /**
+     * Removes an attribute by name.
+     *
+     * @param string $name
+     */
+    public function removeAttribute($name)
+    {
+        unset($this->attributes[$name]);
+    }
+
+    /**
+     * Returns true if the node with the given name exists.
+     *
+     * @param string $name
+     *
+     * @return bool
+     */
+    public function hasNode($name)
+    {
+        return array_key_exists($name, $this->nodes);
+    }
+
+    /**
+     * Gets a node by name.
+     *
+     * @param string $name
+     *
+     * @return Twig_Node
+     */
+    public function getNode($name)
+    {
+        if (!array_key_exists($name, $this->nodes)) {
+            throw new LogicException(sprintf('Node "%s" does not exist for Node "%s".', $name, get_class($this)));
+        }
+
+        return $this->nodes[$name];
+    }
+
+    /**
+     * Sets a node.
+     *
+     * @param string    $name
+     * @param Twig_Node $node
+     */
+    public function setNode($name, $node = null)
+    {
+        $this->nodes[$name] = $node;
+    }
+
+    /**
+     * Removes a node by name.
+     *
+     * @param string $name
+     */
+    public function removeNode($name)
+    {
+        unset($this->nodes[$name]);
+    }
+
+    public function count()
+    {
+        return count($this->nodes);
+    }
+
+    public function getIterator()
+    {
+        return new ArrayIterator($this->nodes);
+    }
+}
diff --git a/public/system/library/template/Twig/Node/AutoEscape.php b/public/system/library/template/Twig/Node/AutoEscape.php
new file mode 100644
index 0000000..47cc998
--- /dev/null
+++ b/public/system/library/template/Twig/Node/AutoEscape.php
@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents an autoescape node.
+ *
+ * The value is the escaping strategy (can be html, js, ...)
+ *
+ * The true value is equivalent to html.
+ *
+ * If autoescaping is disabled, then the value is false.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_AutoEscape extends Twig_Node
+{
+    public function __construct($value, Twig_NodeInterface $body, $lineno, $tag = 'autoescape')
+    {
+        parent::__construct(array('body' => $body), array('value' => $value), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->subcompile($this->getNode('body'));
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Block.php b/public/system/library/template/Twig/Node/Block.php
new file mode 100644
index 0000000..a05af6f
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Block.php
@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a block node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Block extends Twig_Node
+{
+    public function __construct($name, Twig_NodeInterface $body, $lineno, $tag = null)
+    {
+        parent::__construct(array('body' => $body), array('name' => $name), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write(sprintf("public function block_%s(\$context, array \$blocks = array())\n", $this->getAttribute('name')), "{\n")
+            ->indent()
+        ;
+
+        $compiler
+            ->subcompile($this->getNode('body'))
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/BlockReference.php b/public/system/library/template/Twig/Node/BlockReference.php
new file mode 100644
index 0000000..9cd1551
--- /dev/null
+++ b/public/system/library/template/Twig/Node/BlockReference.php
@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a block call node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_BlockReference extends Twig_Node implements Twig_NodeOutputInterface
+{
+    public function __construct($name, $lineno, $tag = null)
+    {
+        parent::__construct(array(), array('name' => $name), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write(sprintf("\$this->displayBlock('%s', \$context, \$blocks);\n", $this->getAttribute('name')))
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Body.php b/public/system/library/template/Twig/Node/Body.php
new file mode 100644
index 0000000..3ffb134
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Body.php
@@ -0,0 +1,19 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a body node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Body extends Twig_Node
+{
+}
diff --git a/public/system/library/template/Twig/Node/CheckSecurity.php b/public/system/library/template/Twig/Node/CheckSecurity.php
new file mode 100644
index 0000000..b4a436a
--- /dev/null
+++ b/public/system/library/template/Twig/Node/CheckSecurity.php
@@ -0,0 +1,78 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_CheckSecurity extends Twig_Node
+{
+    protected $usedFilters;
+    protected $usedTags;
+    protected $usedFunctions;
+
+    public function __construct(array $usedFilters, array $usedTags, array $usedFunctions)
+    {
+        $this->usedFilters = $usedFilters;
+        $this->usedTags = $usedTags;
+        $this->usedFunctions = $usedFunctions;
+
+        parent::__construct();
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $tags = $filters = $functions = array();
+        foreach (array('tags', 'filters', 'functions') as $type) {
+            foreach ($this->{'used'.ucfirst($type)} as $name => $node) {
+                if ($node instanceof Twig_Node) {
+                    ${$type}[$name] = $node->getLine();
+                } else {
+                    ${$type}[$node] = null;
+                }
+            }
+        }
+
+        $compiler
+            ->write('$tags = ')->repr(array_filter($tags))->raw(";\n")
+            ->write('$filters = ')->repr(array_filter($filters))->raw(";\n")
+            ->write('$functions = ')->repr(array_filter($functions))->raw(";\n\n")
+            ->write("try {\n")
+            ->indent()
+            ->write("\$this->env->getExtension('sandbox')->checkSecurity(\n")
+            ->indent()
+            ->write(!$tags ? "array(),\n" : "array('".implode("', '", array_keys($tags))."'),\n")
+            ->write(!$filters ? "array(),\n" : "array('".implode("', '", array_keys($filters))."'),\n")
+            ->write(!$functions ? "array()\n" : "array('".implode("', '", array_keys($functions))."')\n")
+            ->outdent()
+            ->write(");\n")
+            ->outdent()
+            ->write("} catch (Twig_Sandbox_SecurityError \$e) {\n")
+            ->indent()
+            ->write("\$e->setTemplateFile(\$this->getTemplateName());\n\n")
+            ->write("if (\$e instanceof Twig_Sandbox_SecurityNotAllowedTagError && isset(\$tags[\$e->getTagName()])) {\n")
+            ->indent()
+            ->write("\$e->setTemplateLine(\$tags[\$e->getTagName()]);\n")
+            ->outdent()
+            ->write("} elseif (\$e instanceof Twig_Sandbox_SecurityNotAllowedFilterError && isset(\$filters[\$e->getFilterName()])) {\n")
+            ->indent()
+            ->write("\$e->setTemplateLine(\$filters[\$e->getFilterName()]);\n")
+            ->outdent()
+            ->write("} elseif (\$e instanceof Twig_Sandbox_SecurityNotAllowedFunctionError && isset(\$functions[\$e->getFunctionName()])) {\n")
+            ->indent()
+            ->write("\$e->setTemplateLine(\$functions[\$e->getFunctionName()]);\n")
+            ->outdent()
+            ->write("}\n\n")
+            ->write("throw \$e;\n")
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Do.php b/public/system/library/template/Twig/Node/Do.php
new file mode 100644
index 0000000..14fb84e
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Do.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a do node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Do extends Twig_Node
+{
+    public function __construct(Twig_Node_Expression $expr, $lineno, $tag = null)
+    {
+        parent::__construct(array('expr' => $expr), array(), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write('')
+            ->subcompile($this->getNode('expr'))
+            ->raw(";\n")
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Embed.php b/public/system/library/template/Twig/Node/Embed.php
new file mode 100644
index 0000000..a213040
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Embed.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents an embed node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Embed extends Twig_Node_Include
+{
+    // we don't inject the module to avoid node visitors to traverse it twice (as it will be already visited in the main module)
+    public function __construct($filename, $index, Twig_Node_Expression $variables = null, $only = false, $ignoreMissing = false, $lineno, $tag = null)
+    {
+        parent::__construct(new Twig_Node_Expression_Constant('not_used', $lineno), $variables, $only, $ignoreMissing, $lineno, $tag);
+
+        $this->setAttribute('filename', $filename);
+        $this->setAttribute('index', $index);
+    }
+
+    protected function addGetTemplate(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write('$this->loadTemplate(')
+            ->string($this->getAttribute('filename'))
+            ->raw(', ')
+            ->repr($compiler->getFilename())
+            ->raw(', ')
+            ->repr($this->getLine())
+            ->raw(', ')
+            ->string($this->getAttribute('index'))
+            ->raw(')')
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression.php b/public/system/library/template/Twig/Node/Expression.php
new file mode 100644
index 0000000..a7382e7
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression.php
@@ -0,0 +1,20 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Abstract class for all nodes that represents an expression.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class Twig_Node_Expression extends Twig_Node
+{
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Array.php b/public/system/library/template/Twig/Node/Expression/Array.php
new file mode 100644
index 0000000..83e583b
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Array.php
@@ -0,0 +1,81 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Array extends Twig_Node_Expression
+{
+    protected $index;
+
+    public function __construct(array $elements, $lineno)
+    {
+        parent::__construct($elements, array(), $lineno);
+
+        $this->index = -1;
+        foreach ($this->getKeyValuePairs() as $pair) {
+            if ($pair['key'] instanceof Twig_Node_Expression_Constant && ctype_digit((string) $pair['key']->getAttribute('value')) && $pair['key']->getAttribute('value') > $this->index) {
+                $this->index = $pair['key']->getAttribute('value');
+            }
+        }
+    }
+
+    public function getKeyValuePairs()
+    {
+        $pairs = array();
+
+        foreach (array_chunk($this->nodes, 2) as $pair) {
+            $pairs[] = array(
+                'key' => $pair[0],
+                'value' => $pair[1],
+            );
+        }
+
+        return $pairs;
+    }
+
+    public function hasElement(Twig_Node_Expression $key)
+    {
+        foreach ($this->getKeyValuePairs() as $pair) {
+            // we compare the string representation of the keys
+            // to avoid comparing the line numbers which are not relevant here.
+            if ((string) $key == (string) $pair['key']) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function addElement(Twig_Node_Expression $value, Twig_Node_Expression $key = null)
+    {
+        if (null === $key) {
+            $key = new Twig_Node_Expression_Constant(++$this->index, $value->getLine());
+        }
+
+        array_push($this->nodes, $key, $value);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->raw('array(');
+        $first = true;
+        foreach ($this->getKeyValuePairs() as $pair) {
+            if (!$first) {
+                $compiler->raw(', ');
+            }
+            $first = false;
+
+            $compiler
+                ->subcompile($pair['key'])
+                ->raw(' => ')
+                ->subcompile($pair['value'])
+            ;
+        }
+        $compiler->raw(')');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/AssignName.php b/public/system/library/template/Twig/Node/Expression/AssignName.php
new file mode 100644
index 0000000..ce0c5fb
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/AssignName.php
@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Node_Expression_AssignName extends Twig_Node_Expression_Name
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('$context[')
+            ->string($this->getAttribute('name'))
+            ->raw(']')
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary.php b/public/system/library/template/Twig/Node/Expression/Binary.php
new file mode 100644
index 0000000..c821db5
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary.php
@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+abstract class Twig_Node_Expression_Binary extends Twig_Node_Expression
+{
+    public function __construct(Twig_NodeInterface $left, Twig_NodeInterface $right, $lineno)
+    {
+        parent::__construct(array('left' => $left, 'right' => $right), array(), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(')
+            ->subcompile($this->getNode('left'))
+            ->raw(' ')
+        ;
+        $this->operator($compiler);
+        $compiler
+            ->raw(' ')
+            ->subcompile($this->getNode('right'))
+            ->raw(')')
+        ;
+    }
+
+    abstract public function operator(Twig_Compiler $compiler);
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Add.php b/public/system/library/template/Twig/Node/Expression/Binary/Add.php
new file mode 100644
index 0000000..0ef8e11
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Add.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Add extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('+');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/And.php b/public/system/library/template/Twig/Node/Expression/Binary/And.php
new file mode 100644
index 0000000..d5752eb
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/And.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_And extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('&&');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/BitwiseAnd.php b/public/system/library/template/Twig/Node/Expression/Binary/BitwiseAnd.php
new file mode 100644
index 0000000..9a46d84
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/BitwiseAnd.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_BitwiseAnd extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('&');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/BitwiseOr.php b/public/system/library/template/Twig/Node/Expression/Binary/BitwiseOr.php
new file mode 100644
index 0000000..058a20b
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/BitwiseOr.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_BitwiseOr extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('|');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/BitwiseXor.php b/public/system/library/template/Twig/Node/Expression/Binary/BitwiseXor.php
new file mode 100644
index 0000000..f4da73d
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/BitwiseXor.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_BitwiseXor extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('^');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Concat.php b/public/system/library/template/Twig/Node/Expression/Binary/Concat.php
new file mode 100644
index 0000000..f9a6462
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Concat.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Concat extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('.');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Div.php b/public/system/library/template/Twig/Node/Expression/Binary/Div.php
new file mode 100644
index 0000000..e0797a6
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Div.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Div extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('/');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/EndsWith.php b/public/system/library/template/Twig/Node/Expression/Binary/EndsWith.php
new file mode 100644
index 0000000..93b3b96
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/EndsWith.php
@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2013 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_EndsWith extends Twig_Node_Expression_Binary
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $left = $compiler->getVarName();
+        $right = $compiler->getVarName();
+        $compiler
+            ->raw(sprintf('(is_string($%s = ', $left))
+            ->subcompile($this->getNode('left'))
+            ->raw(sprintf(') && is_string($%s = ', $right))
+            ->subcompile($this->getNode('right'))
+            ->raw(sprintf(') && (\'\' === $%2$s || $%2$s === substr($%1$s, -strlen($%2$s))))', $left, $right))
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Equal.php b/public/system/library/template/Twig/Node/Expression/Binary/Equal.php
new file mode 100644
index 0000000..7b1236d
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Equal.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Equal extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('==');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/FloorDiv.php b/public/system/library/template/Twig/Node/Expression/Binary/FloorDiv.php
new file mode 100644
index 0000000..b606f6d
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/FloorDiv.php
@@ -0,0 +1,24 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_FloorDiv extends Twig_Node_Expression_Binary
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->raw('intval(floor(');
+        parent::compile($compiler);
+        $compiler->raw('))');
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('/');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Greater.php b/public/system/library/template/Twig/Node/Expression/Binary/Greater.php
new file mode 100644
index 0000000..a110bd9
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Greater.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Greater extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('>');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/GreaterEqual.php b/public/system/library/template/Twig/Node/Expression/Binary/GreaterEqual.php
new file mode 100644
index 0000000..3754fed
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/GreaterEqual.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_GreaterEqual extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('>=');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/In.php b/public/system/library/template/Twig/Node/Expression/Binary/In.php
new file mode 100644
index 0000000..9565a60
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/In.php
@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_In extends Twig_Node_Expression_Binary
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('twig_in_filter(')
+            ->subcompile($this->getNode('left'))
+            ->raw(', ')
+            ->subcompile($this->getNode('right'))
+            ->raw(')')
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('in');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Less.php b/public/system/library/template/Twig/Node/Expression/Binary/Less.php
new file mode 100644
index 0000000..45fd300
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Less.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Less extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('<');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/LessEqual.php b/public/system/library/template/Twig/Node/Expression/Binary/LessEqual.php
new file mode 100644
index 0000000..e38e257
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/LessEqual.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_LessEqual extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('<=');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Matches.php b/public/system/library/template/Twig/Node/Expression/Binary/Matches.php
new file mode 100644
index 0000000..93bb292
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Matches.php
@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2013 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Matches extends Twig_Node_Expression_Binary
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('preg_match(')
+            ->subcompile($this->getNode('right'))
+            ->raw(', ')
+            ->subcompile($this->getNode('left'))
+            ->raw(')')
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Mod.php b/public/system/library/template/Twig/Node/Expression/Binary/Mod.php
new file mode 100644
index 0000000..9924114
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Mod.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Mod extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('%');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Mul.php b/public/system/library/template/Twig/Node/Expression/Binary/Mul.php
new file mode 100644
index 0000000..c91529c
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Mul.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Mul extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('*');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/NotEqual.php b/public/system/library/template/Twig/Node/Expression/Binary/NotEqual.php
new file mode 100644
index 0000000..26867ba
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/NotEqual.php
@@ -0,0 +1,17 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_NotEqual extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('!=');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/NotIn.php b/public/system/library/template/Twig/Node/Expression/Binary/NotIn.php
new file mode 100644
index 0000000..49ab39e
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/NotIn.php
@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_NotIn extends Twig_Node_Expression_Binary
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('!twig_in_filter(')
+            ->subcompile($this->getNode('left'))
+            ->raw(', ')
+            ->subcompile($this->getNode('right'))
+            ->raw(')')
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('not in');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Or.php b/public/system/library/template/Twig/Node/Expression/Binary/Or.php
new file mode 100644
index 0000000..adba49c
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Or.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Or extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('||');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Power.php b/public/system/library/template/Twig/Node/Expression/Binary/Power.php
new file mode 100644
index 0000000..cd6d046
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Power.php
@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Power extends Twig_Node_Expression_Binary
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('pow(')
+            ->subcompile($this->getNode('left'))
+            ->raw(', ')
+            ->subcompile($this->getNode('right'))
+            ->raw(')')
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('**');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Range.php b/public/system/library/template/Twig/Node/Expression/Binary/Range.php
new file mode 100644
index 0000000..692ec9c
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Range.php
@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Range extends Twig_Node_Expression_Binary
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('range(')
+            ->subcompile($this->getNode('left'))
+            ->raw(', ')
+            ->subcompile($this->getNode('right'))
+            ->raw(')')
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('..');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/StartsWith.php b/public/system/library/template/Twig/Node/Expression/Binary/StartsWith.php
new file mode 100644
index 0000000..d2e30d6
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/StartsWith.php
@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2013 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_StartsWith extends Twig_Node_Expression_Binary
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $left = $compiler->getVarName();
+        $right = $compiler->getVarName();
+        $compiler
+            ->raw(sprintf('(is_string($%s = ', $left))
+            ->subcompile($this->getNode('left'))
+            ->raw(sprintf(') && is_string($%s = ', $right))
+            ->subcompile($this->getNode('right'))
+            ->raw(sprintf(') && (\'\' === $%2$s || 0 === strpos($%1$s, $%2$s)))', $left, $right))
+        ;
+    }
+
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Binary/Sub.php b/public/system/library/template/Twig/Node/Expression/Binary/Sub.php
new file mode 100644
index 0000000..d446399
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Binary/Sub.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Binary_Sub extends Twig_Node_Expression_Binary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        return $compiler->raw('-');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/BlockReference.php b/public/system/library/template/Twig/Node/Expression/BlockReference.php
new file mode 100644
index 0000000..f6ed6ff
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/BlockReference.php
@@ -0,0 +1,46 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a block call node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_BlockReference extends Twig_Node_Expression
+{
+    public function __construct(Twig_NodeInterface $name, $asString = false, $lineno, $tag = null)
+    {
+        parent::__construct(array('name' => $name), array('as_string' => $asString, 'output' => false), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        if ($this->getAttribute('as_string')) {
+            $compiler->raw('(string) ');
+        }
+
+        if ($this->getAttribute('output')) {
+            $compiler
+                ->addDebugInfo($this)
+                ->write('$this->displayBlock(')
+                ->subcompile($this->getNode('name'))
+                ->raw(", \$context, \$blocks);\n")
+            ;
+        } else {
+            $compiler
+                ->raw('$this->renderBlock(')
+                ->subcompile($this->getNode('name'))
+                ->raw(', $context, $blocks)')
+            ;
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Call.php b/public/system/library/template/Twig/Node/Expression/Call.php
new file mode 100644
index 0000000..240553f
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Call.php
@@ -0,0 +1,253 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+abstract class Twig_Node_Expression_Call extends Twig_Node_Expression
+{
+    protected function compileCallable(Twig_Compiler $compiler)
+    {
+        $closingParenthesis = false;
+        if ($this->hasAttribute('callable') && $callable = $this->getAttribute('callable')) {
+            if (is_string($callable)) {
+                $compiler->raw($callable);
+            } elseif (is_array($callable) && $callable[0] instanceof Twig_ExtensionInterface) {
+                $compiler->raw(sprintf('$this->env->getExtension(\'%s\')->%s', $callable[0]->getName(), $callable[1]));
+            } else {
+                $type = ucfirst($this->getAttribute('type'));
+                $compiler->raw(sprintf('call_user_func_array($this->env->get%s(\'%s\')->getCallable(), array', $type, $this->getAttribute('name')));
+                $closingParenthesis = true;
+            }
+        } else {
+            $compiler->raw($this->getAttribute('thing')->compile());
+        }
+
+        $this->compileArguments($compiler);
+
+        if ($closingParenthesis) {
+            $compiler->raw(')');
+        }
+    }
+
+    protected function compileArguments(Twig_Compiler $compiler)
+    {
+        $compiler->raw('(');
+
+        $first = true;
+
+        if ($this->hasAttribute('needs_environment') && $this->getAttribute('needs_environment')) {
+            $compiler->raw('$this->env');
+            $first = false;
+        }
+
+        if ($this->hasAttribute('needs_context') && $this->getAttribute('needs_context')) {
+            if (!$first) {
+                $compiler->raw(', ');
+            }
+            $compiler->raw('$context');
+            $first = false;
+        }
+
+        if ($this->hasAttribute('arguments')) {
+            foreach ($this->getAttribute('arguments') as $argument) {
+                if (!$first) {
+                    $compiler->raw(', ');
+                }
+                $compiler->string($argument);
+                $first = false;
+            }
+        }
+
+        if ($this->hasNode('node')) {
+            if (!$first) {
+                $compiler->raw(', ');
+            }
+            $compiler->subcompile($this->getNode('node'));
+            $first = false;
+        }
+
+        if ($this->hasNode('arguments') && null !== $this->getNode('arguments')) {
+            $callable = $this->hasAttribute('callable') ? $this->getAttribute('callable') : null;
+
+            $arguments = $this->getArguments($callable, $this->getNode('arguments'));
+
+            foreach ($arguments as $node) {
+                if (!$first) {
+                    $compiler->raw(', ');
+                }
+                $compiler->subcompile($node);
+                $first = false;
+            }
+        }
+
+        $compiler->raw(')');
+    }
+
+    protected function getArguments($callable, $arguments)
+    {
+        $callType = $this->getAttribute('type');
+        $callName = $this->getAttribute('name');
+
+        $parameters = array();
+        $named = false;
+        foreach ($arguments as $name => $node) {
+            if (!is_int($name)) {
+                $named = true;
+                $name = $this->normalizeName($name);
+            } elseif ($named) {
+                throw new Twig_Error_Syntax(sprintf('Positional arguments cannot be used after named arguments for %s "%s".', $callType, $callName));
+            }
+
+            $parameters[$name] = $node;
+        }
+
+        $isVariadic = $this->hasAttribute('is_variadic') && $this->getAttribute('is_variadic');
+        if (!$named && !$isVariadic) {
+            return $parameters;
+        }
+
+        if (!$callable) {
+            if ($named) {
+                $message = sprintf('Named arguments are not supported for %s "%s".', $callType, $callName);
+            } else {
+                $message = sprintf('Arbitrary positional arguments are not supported for %s "%s".', $callType, $callName);
+            }
+
+            throw new LogicException($message);
+        }
+
+        // manage named arguments
+        $callableParameters = $this->getCallableParameters($callable, $isVariadic);
+        $arguments = array();
+        $names = array();
+        $missingArguments = array();
+        $optionalArguments = array();
+        $pos = 0;
+        foreach ($callableParameters as $callableParameter) {
+            $names[] = $name = $this->normalizeName($callableParameter->name);
+
+            if (array_key_exists($name, $parameters)) {
+                if (array_key_exists($pos, $parameters)) {
+                    throw new Twig_Error_Syntax(sprintf('Argument "%s" is defined twice for %s "%s".', $name, $callType, $callName));
+                }
+
+                if (!empty($missingArguments)) {
+                    throw new Twig_Error_Syntax(sprintf(
+                        'Argument "%s" could not be assigned for %s "%s(%s)" because it is mapped to an internal PHP function which cannot determine default value for optional argument%s "%s".',
+                        $name, $callType, $callName, implode(', ', $names), count($missingArguments) > 1 ? 's' : '', implode('", "', $missingArguments))
+                    );
+                }
+
+                $arguments = array_merge($arguments, $optionalArguments);
+                $arguments[] = $parameters[$name];
+                unset($parameters[$name]);
+                $optionalArguments = array();
+            } elseif (array_key_exists($pos, $parameters)) {
+                $arguments = array_merge($arguments, $optionalArguments);
+                $arguments[] = $parameters[$pos];
+                unset($parameters[$pos]);
+                $optionalArguments = array();
+                ++$pos;
+            } elseif ($callableParameter->isDefaultValueAvailable()) {
+                $optionalArguments[] = new Twig_Node_Expression_Constant($callableParameter->getDefaultValue(), -1);
+            } elseif ($callableParameter->isOptional()) {
+                if (empty($parameters)) {
+                    break;
+                } else {
+                    $missingArguments[] = $name;
+                }
+            } else {
+                throw new Twig_Error_Syntax(sprintf('Value for argument "%s" is required for %s "%s".', $name, $callType, $callName));
+            }
+        }
+
+        if ($isVariadic) {
+            $arbitraryArguments = new Twig_Node_Expression_Array(array(), -1);
+            foreach ($parameters as $key => $value) {
+                if (is_int($key)) {
+                    $arbitraryArguments->addElement($value);
+                } else {
+                    $arbitraryArguments->addElement($value, new Twig_Node_Expression_Constant($key, -1));
+                }
+                unset($parameters[$key]);
+            }
+
+            if ($arbitraryArguments->count()) {
+                $arguments = array_merge($arguments, $optionalArguments);
+                $arguments[] = $arbitraryArguments;
+            }
+        }
+
+        if (!empty($parameters)) {
+            $unknownParameter = null;
+            foreach ($parameters as $parameter) {
+                if ($parameter instanceof Twig_Node) {
+                    $unknownParameter = $parameter;
+                    break;
+                }
+            }
+
+            throw new Twig_Error_Syntax(sprintf(
+                'Unknown argument%s "%s" for %s "%s(%s)".',
+                count($parameters) > 1 ? 's' : '', implode('", "', array_keys($parameters)), $callType, $callName, implode(', ', $names)
+            ), $unknownParameter ? $unknownParameter->getLine() : -1);
+        }
+
+        return $arguments;
+    }
+
+    protected function normalizeName($name)
+    {
+        return strtolower(preg_replace(array('/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'), array('\\1_\\2', '\\1_\\2'), $name));
+    }
+
+    private function getCallableParameters($callable, $isVariadic)
+    {
+        if (is_array($callable)) {
+            $r = new ReflectionMethod($callable[0], $callable[1]);
+        } elseif (is_object($callable) && !$callable instanceof Closure) {
+            $r = new ReflectionObject($callable);
+            $r = $r->getMethod('__invoke');
+        } elseif (is_string($callable) && false !== strpos($callable, '::')) {
+            $r = new ReflectionMethod($callable);
+        } else {
+            $r = new ReflectionFunction($callable);
+        }
+
+        $parameters = $r->getParameters();
+        if ($this->hasNode('node')) {
+            array_shift($parameters);
+        }
+        if ($this->hasAttribute('needs_environment') && $this->getAttribute('needs_environment')) {
+            array_shift($parameters);
+        }
+        if ($this->hasAttribute('needs_context') && $this->getAttribute('needs_context')) {
+            array_shift($parameters);
+        }
+        if ($this->hasAttribute('arguments') && null !== $this->getAttribute('arguments')) {
+            foreach ($this->getAttribute('arguments') as $argument) {
+                array_shift($parameters);
+            }
+        }
+        if ($isVariadic) {
+            $argument = end($parameters);
+            if ($argument && $argument->isArray() && $argument->isDefaultValueAvailable() && array() === $argument->getDefaultValue()) {
+                array_pop($parameters);
+            } else {
+                $callableName = $r->name;
+                if ($r->getDeclaringClass()) {
+                    $callableName = $r->getDeclaringClass()->name.'::'.$callableName;
+                }
+
+                throw new LogicException(sprintf('The last parameter of "%s" for %s "%s" must be an array with default value, eg. "array $arg = array()".', $callableName, $this->getAttribute('type'), $this->getAttribute('name')));
+            }
+        }
+
+        return $parameters;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Conditional.php b/public/system/library/template/Twig/Node/Expression/Conditional.php
new file mode 100644
index 0000000..edcb1e2
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Conditional.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Conditional extends Twig_Node_Expression
+{
+    public function __construct(Twig_Node_Expression $expr1, Twig_Node_Expression $expr2, Twig_Node_Expression $expr3, $lineno)
+    {
+        parent::__construct(array('expr1' => $expr1, 'expr2' => $expr2, 'expr3' => $expr3), array(), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('((')
+            ->subcompile($this->getNode('expr1'))
+            ->raw(') ? (')
+            ->subcompile($this->getNode('expr2'))
+            ->raw(') : (')
+            ->subcompile($this->getNode('expr3'))
+            ->raw('))')
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Constant.php b/public/system/library/template/Twig/Node/Expression/Constant.php
new file mode 100644
index 0000000..a91dc69
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Constant.php
@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Constant extends Twig_Node_Expression
+{
+    public function __construct($value, $lineno)
+    {
+        parent::__construct(array(), array('value' => $value), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->repr($this->getAttribute('value'));
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/ExtensionReference.php b/public/system/library/template/Twig/Node/Expression/ExtensionReference.php
new file mode 100644
index 0000000..b4882e3
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/ExtensionReference.php
@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Node_Expression_ExtensionReference class is deprecated since version 1.23 and will be removed in 2.0.', E_USER_DEPRECATED);
+
+/**
+ * Represents an extension call node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.23 and will be removed in 2.0.
+ */
+class Twig_Node_Expression_ExtensionReference extends Twig_Node_Expression
+{
+    public function __construct($name, $lineno, $tag = null)
+    {
+        parent::__construct(array(), array('name' => $name), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->raw(sprintf("\$this->env->getExtension('%s')", $this->getAttribute('name')));
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Filter.php b/public/system/library/template/Twig/Node/Expression/Filter.php
new file mode 100644
index 0000000..a906232
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Filter.php
@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Filter extends Twig_Node_Expression_Call
+{
+    public function __construct(Twig_NodeInterface $node, Twig_Node_Expression_Constant $filterName, Twig_NodeInterface $arguments, $lineno, $tag = null)
+    {
+        parent::__construct(array('node' => $node, 'filter' => $filterName, 'arguments' => $arguments), array(), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $name = $this->getNode('filter')->getAttribute('value');
+        $filter = $compiler->getEnvironment()->getFilter($name);
+
+        $this->setAttribute('name', $name);
+        $this->setAttribute('type', 'filter');
+        $this->setAttribute('thing', $filter);
+        $this->setAttribute('needs_environment', $filter->needsEnvironment());
+        $this->setAttribute('needs_context', $filter->needsContext());
+        $this->setAttribute('arguments', $filter->getArguments());
+        if ($filter instanceof Twig_FilterCallableInterface || $filter instanceof Twig_SimpleFilter) {
+            $this->setAttribute('callable', $filter->getCallable());
+        }
+        if ($filter instanceof Twig_SimpleFilter) {
+            $this->setAttribute('is_variadic', $filter->isVariadic());
+        }
+
+        $this->compileCallable($compiler);
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Filter/Default.php b/public/system/library/template/Twig/Node/Expression/Filter/Default.php
new file mode 100644
index 0000000..1827c88
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Filter/Default.php
@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Returns the value or the default value when it is undefined or empty.
+ *
+ * <pre>
+ *  {{ var.foo|default('foo item on var is not defined') }}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Filter_Default extends Twig_Node_Expression_Filter
+{
+    public function __construct(Twig_NodeInterface $node, Twig_Node_Expression_Constant $filterName, Twig_NodeInterface $arguments, $lineno, $tag = null)
+    {
+        $default = new Twig_Node_Expression_Filter($node, new Twig_Node_Expression_Constant('default', $node->getLine()), $arguments, $node->getLine());
+
+        if ('default' === $filterName->getAttribute('value') && ($node instanceof Twig_Node_Expression_Name || $node instanceof Twig_Node_Expression_GetAttr)) {
+            $test = new Twig_Node_Expression_Test_Defined(clone $node, 'defined', new Twig_Node(), $node->getLine());
+            $false = count($arguments) ? $arguments->getNode(0) : new Twig_Node_Expression_Constant('', $node->getLine());
+
+            $node = new Twig_Node_Expression_Conditional($test, $default, $false, $node->getLine());
+        } else {
+            $node = $default;
+        }
+
+        parent::__construct($node, $filterName, $arguments, $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->subcompile($this->getNode('node'));
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Function.php b/public/system/library/template/Twig/Node/Expression/Function.php
new file mode 100644
index 0000000..7326ede
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Function.php
@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Function extends Twig_Node_Expression_Call
+{
+    public function __construct($name, Twig_NodeInterface $arguments, $lineno)
+    {
+        parent::__construct(array('arguments' => $arguments), array('name' => $name), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $name = $this->getAttribute('name');
+        $function = $compiler->getEnvironment()->getFunction($name);
+
+        $this->setAttribute('name', $name);
+        $this->setAttribute('type', 'function');
+        $this->setAttribute('thing', $function);
+        $this->setAttribute('needs_environment', $function->needsEnvironment());
+        $this->setAttribute('needs_context', $function->needsContext());
+        $this->setAttribute('arguments', $function->getArguments());
+        if ($function instanceof Twig_FunctionCallableInterface || $function instanceof Twig_SimpleFunction) {
+            $this->setAttribute('callable', $function->getCallable());
+        }
+        if ($function instanceof Twig_SimpleFunction) {
+            $this->setAttribute('is_variadic', $function->isVariadic());
+        }
+
+        $this->compileCallable($compiler);
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/GetAttr.php b/public/system/library/template/Twig/Node/Expression/GetAttr.php
new file mode 100644
index 0000000..6ce6111
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/GetAttr.php
@@ -0,0 +1,63 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_GetAttr extends Twig_Node_Expression
+{
+    public function __construct(Twig_Node_Expression $node, Twig_Node_Expression $attribute, Twig_Node_Expression $arguments = null, $type, $lineno)
+    {
+        parent::__construct(array('node' => $node, 'attribute' => $attribute, 'arguments' => $arguments), array('type' => $type, 'is_defined_test' => false, 'ignore_strict_check' => false, 'disable_c_ext' => false), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        if (function_exists('twig_template_get_attributes') && !$this->getAttribute('disable_c_ext')) {
+            $compiler->raw('twig_template_get_attributes($this, ');
+        } else {
+            $compiler->raw('$this->getAttribute(');
+        }
+
+        if ($this->getAttribute('ignore_strict_check')) {
+            $this->getNode('node')->setAttribute('ignore_strict_check', true);
+        }
+
+        $compiler->subcompile($this->getNode('node'));
+
+        $compiler->raw(', ')->subcompile($this->getNode('attribute'));
+
+        // only generate optional arguments when needed (to make generated code more readable)
+        $needFourth = $this->getAttribute('ignore_strict_check');
+        $needThird = $needFourth || $this->getAttribute('is_defined_test');
+        $needSecond = $needThird || Twig_Template::ANY_CALL !== $this->getAttribute('type');
+        $needFirst = $needSecond || null !== $this->getNode('arguments');
+
+        if ($needFirst) {
+            if (null !== $this->getNode('arguments')) {
+                $compiler->raw(', ')->subcompile($this->getNode('arguments'));
+            } else {
+                $compiler->raw(', array()');
+            }
+        }
+
+        if ($needSecond) {
+            $compiler->raw(', ')->repr($this->getAttribute('type'));
+        }
+
+        if ($needThird) {
+            $compiler->raw(', ')->repr($this->getAttribute('is_defined_test'));
+        }
+
+        if ($needFourth) {
+            $compiler->raw(', ')->repr($this->getAttribute('ignore_strict_check'));
+        }
+
+        $compiler->raw(')');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/MethodCall.php b/public/system/library/template/Twig/Node/Expression/MethodCall.php
new file mode 100644
index 0000000..620b02b
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/MethodCall.php
@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_MethodCall extends Twig_Node_Expression
+{
+    public function __construct(Twig_Node_Expression $node, $method, Twig_Node_Expression_Array $arguments, $lineno)
+    {
+        parent::__construct(array('node' => $node, 'arguments' => $arguments), array('method' => $method, 'safe' => false), $lineno);
+
+        if ($node instanceof Twig_Node_Expression_Name) {
+            $node->setAttribute('always_defined', true);
+        }
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->subcompile($this->getNode('node'))
+            ->raw('->')
+            ->raw($this->getAttribute('method'))
+            ->raw('(')
+        ;
+        $first = true;
+        foreach ($this->getNode('arguments')->getKeyValuePairs() as $pair) {
+            if (!$first) {
+                $compiler->raw(', ');
+            }
+            $first = false;
+
+            $compiler->subcompile($pair['value']);
+        }
+        $compiler->raw(')');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Name.php b/public/system/library/template/Twig/Node/Expression/Name.php
new file mode 100644
index 0000000..a6e0ff4
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Name.php
@@ -0,0 +1,90 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Name extends Twig_Node_Expression
+{
+    protected $specialVars = array(
+        '_self' => '$this',
+        '_context' => '$context',
+        '_charset' => '$this->env->getCharset()',
+    );
+
+    public function __construct($name, $lineno)
+    {
+        parent::__construct(array(), array('name' => $name, 'is_defined_test' => false, 'ignore_strict_check' => false, 'always_defined' => false), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $name = $this->getAttribute('name');
+
+        $compiler->addDebugInfo($this);
+
+        if ($this->getAttribute('is_defined_test')) {
+            if ($this->isSpecial()) {
+                $compiler->repr(true);
+            } else {
+                $compiler->raw('array_key_exists(')->repr($name)->raw(', $context)');
+            }
+        } elseif ($this->isSpecial()) {
+            $compiler->raw($this->specialVars[$name]);
+        } elseif ($this->getAttribute('always_defined')) {
+            $compiler
+                ->raw('$context[')
+                ->string($name)
+                ->raw(']')
+            ;
+        } else {
+            // remove the non-PHP 5.4 version when PHP 5.3 support is dropped
+            // as the non-optimized version is just a workaround for slow ternary operator
+            // when the context has a lot of variables
+            if (PHP_VERSION_ID >= 50400) {
+                // PHP 5.4 ternary operator performance was optimized
+                $compiler
+                    ->raw('(isset($context[')
+                    ->string($name)
+                    ->raw(']) ? $context[')
+                    ->string($name)
+                    ->raw('] : ')
+                ;
+
+                if ($this->getAttribute('ignore_strict_check') || !$compiler->getEnvironment()->isStrictVariables()) {
+                    $compiler->raw('null)');
+                } else {
+                    $compiler->raw('$this->getContext($context, ')->string($name)->raw('))');
+                }
+            } else {
+                $compiler
+                    ->raw('$this->getContext($context, ')
+                    ->string($name)
+                ;
+
+                if ($this->getAttribute('ignore_strict_check')) {
+                    $compiler->raw(', true');
+                }
+
+                $compiler
+                    ->raw(')')
+                ;
+            }
+        }
+    }
+
+    public function isSpecial()
+    {
+        return isset($this->specialVars[$this->getAttribute('name')]);
+    }
+
+    public function isSimple()
+    {
+        return !$this->isSpecial() && !$this->getAttribute('is_defined_test');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/NullCoalesce.php b/public/system/library/template/Twig/Node/Expression/NullCoalesce.php
new file mode 100644
index 0000000..1003913
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/NullCoalesce.php
@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_NullCoalesce extends Twig_Node_Expression_Conditional
+{
+    public function __construct(Twig_NodeInterface $left, Twig_NodeInterface $right, $lineno)
+    {
+        $test = new Twig_Node_Expression_Binary_And(
+            new Twig_Node_Expression_Test_Defined(clone $left, 'defined', new Twig_Node(), $left->getLine()),
+            new Twig_Node_Expression_Unary_Not(new Twig_Node_Expression_Test_Null($left, 'null', new Twig_Node(), $left->getLine()), $left->getLine()),
+            $left->getLine()
+        );
+
+        parent::__construct($test, $left, $right, $lineno);
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Parent.php b/public/system/library/template/Twig/Node/Expression/Parent.php
new file mode 100644
index 0000000..694c080
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Parent.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a parent node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Parent extends Twig_Node_Expression
+{
+    public function __construct($name, $lineno, $tag = null)
+    {
+        parent::__construct(array(), array('output' => false, 'name' => $name), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        if ($this->getAttribute('output')) {
+            $compiler
+                ->addDebugInfo($this)
+                ->write('$this->displayParentBlock(')
+                ->string($this->getAttribute('name'))
+                ->raw(", \$context, \$blocks);\n")
+            ;
+        } else {
+            $compiler
+                ->raw('$this->renderParentBlock(')
+                ->string($this->getAttribute('name'))
+                ->raw(', $context, $blocks)')
+            ;
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/TempName.php b/public/system/library/template/Twig/Node/Expression/TempName.php
new file mode 100644
index 0000000..e6b058e
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/TempName.php
@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_TempName extends Twig_Node_Expression
+{
+    public function __construct($name, $lineno)
+    {
+        parent::__construct(array(), array('name' => $name), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('$_')
+            ->raw($this->getAttribute('name'))
+            ->raw('_')
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Test.php b/public/system/library/template/Twig/Node/Expression/Test.php
new file mode 100644
index 0000000..c0358c8
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Test.php
@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Test extends Twig_Node_Expression_Call
+{
+    public function __construct(Twig_NodeInterface $node, $name, Twig_NodeInterface $arguments = null, $lineno)
+    {
+        parent::__construct(array('node' => $node, 'arguments' => $arguments), array('name' => $name), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $name = $this->getAttribute('name');
+        $test = $compiler->getEnvironment()->getTest($name);
+
+        $this->setAttribute('name', $name);
+        $this->setAttribute('type', 'test');
+        $this->setAttribute('thing', $test);
+        if ($test instanceof Twig_TestCallableInterface || $test instanceof Twig_SimpleTest) {
+            $this->setAttribute('callable', $test->getCallable());
+        }
+        if ($test instanceof Twig_SimpleTest) {
+            $this->setAttribute('is_variadic', $test->isVariadic());
+        }
+
+        $this->compileCallable($compiler);
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Test/Constant.php b/public/system/library/template/Twig/Node/Expression/Test/Constant.php
new file mode 100644
index 0000000..de55f5f
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Test/Constant.php
@@ -0,0 +1,46 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks if a variable is the exact same value as a constant.
+ *
+ * <pre>
+ *  {% if post.status is constant('Post::PUBLISHED') %}
+ *    the status attribute is exactly the same as Post::PUBLISHED
+ *  {% endif %}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Constant extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(')
+            ->subcompile($this->getNode('node'))
+            ->raw(' === constant(')
+        ;
+
+        if ($this->getNode('arguments')->hasNode(1)) {
+            $compiler
+                ->raw('get_class(')
+                ->subcompile($this->getNode('arguments')->getNode(1))
+                ->raw(')."::".')
+            ;
+        }
+
+        $compiler
+            ->subcompile($this->getNode('arguments')->getNode(0))
+            ->raw('))')
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Test/Defined.php b/public/system/library/template/Twig/Node/Expression/Test/Defined.php
new file mode 100644
index 0000000..3dc6ff5
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Test/Defined.php
@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks if a variable is defined in the current context.
+ *
+ * <pre>
+ * {# defined works with variable names and variable attributes #}
+ * {% if foo is defined %}
+ *     {# ... #}
+ * {% endif %}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Defined extends Twig_Node_Expression_Test
+{
+    public function __construct(Twig_NodeInterface $node, $name, Twig_NodeInterface $arguments = null, $lineno)
+    {
+        if ($node instanceof Twig_Node_Expression_Name) {
+            $node->setAttribute('is_defined_test', true);
+        } elseif ($node instanceof Twig_Node_Expression_GetAttr) {
+            $node->setAttribute('is_defined_test', true);
+
+            $this->changeIgnoreStrictCheck($node);
+        } elseif ($node instanceof Twig_Node_Expression_Constant || $node instanceof Twig_Node_Expression_Array) {
+            $node = new Twig_Node_Expression_Constant(true, $node->getLine());
+        } else {
+            throw new Twig_Error_Syntax('The "defined" test only works with simple variables.', $this->getLine());
+        }
+
+        parent::__construct($node, $name, $arguments, $lineno);
+    }
+
+    protected function changeIgnoreStrictCheck(Twig_Node_Expression_GetAttr $node)
+    {
+        $node->setAttribute('ignore_strict_check', true);
+
+        if ($node->getNode('node') instanceof Twig_Node_Expression_GetAttr) {
+            $this->changeIgnoreStrictCheck($node->getNode('node'));
+        }
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->subcompile($this->getNode('node'));
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Test/Divisibleby.php b/public/system/library/template/Twig/Node/Expression/Test/Divisibleby.php
new file mode 100644
index 0000000..d5bed23
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Test/Divisibleby.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks if a variable is divisible by a number.
+ *
+ * <pre>
+ *  {% if loop.index is divisible by(3) %}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Divisibleby extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(0 == ')
+            ->subcompile($this->getNode('node'))
+            ->raw(' % ')
+            ->subcompile($this->getNode('arguments')->getNode(0))
+            ->raw(')')
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Test/Even.php b/public/system/library/template/Twig/Node/Expression/Test/Even.php
new file mode 100644
index 0000000..d7853e8
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Test/Even.php
@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks if a number is even.
+ *
+ * <pre>
+ *  {{ var is even }}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Even extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(')
+            ->subcompile($this->getNode('node'))
+            ->raw(' % 2 == 0')
+            ->raw(')')
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Test/Null.php b/public/system/library/template/Twig/Node/Expression/Test/Null.php
new file mode 100644
index 0000000..1c83825
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Test/Null.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks that a variable is null.
+ *
+ * <pre>
+ *  {{ var is none }}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Null extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(null === ')
+            ->subcompile($this->getNode('node'))
+            ->raw(')')
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Test/Odd.php b/public/system/library/template/Twig/Node/Expression/Test/Odd.php
new file mode 100644
index 0000000..421c19e
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Test/Odd.php
@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks if a number is odd.
+ *
+ * <pre>
+ *  {{ var is odd }}
+ * </pre>
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Odd extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(')
+            ->subcompile($this->getNode('node'))
+            ->raw(' % 2 == 1')
+            ->raw(')')
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Test/Sameas.php b/public/system/library/template/Twig/Node/Expression/Test/Sameas.php
new file mode 100644
index 0000000..b48905e
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Test/Sameas.php
@@ -0,0 +1,29 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Checks if a variable is the same as another one (=== in PHP).
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Expression_Test_Sameas extends Twig_Node_Expression_Test
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->raw('(')
+            ->subcompile($this->getNode('node'))
+            ->raw(' === ')
+            ->subcompile($this->getNode('arguments')->getNode(0))
+            ->raw(')')
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Unary.php b/public/system/library/template/Twig/Node/Expression/Unary.php
new file mode 100644
index 0000000..1cf54c3
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Unary.php
@@ -0,0 +1,27 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+abstract class Twig_Node_Expression_Unary extends Twig_Node_Expression
+{
+    public function __construct(Twig_NodeInterface $node, $lineno)
+    {
+        parent::__construct(array('node' => $node), array(), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->raw(' ');
+        $this->operator($compiler);
+        $compiler->subcompile($this->getNode('node'));
+    }
+
+    abstract public function operator(Twig_Compiler $compiler);
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Unary/Neg.php b/public/system/library/template/Twig/Node/Expression/Unary/Neg.php
new file mode 100644
index 0000000..2a3937e
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Unary/Neg.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Unary_Neg extends Twig_Node_Expression_Unary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        $compiler->raw('-');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Unary/Not.php b/public/system/library/template/Twig/Node/Expression/Unary/Not.php
new file mode 100644
index 0000000..f94073c
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Unary/Not.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Unary_Not extends Twig_Node_Expression_Unary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        $compiler->raw('!');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Expression/Unary/Pos.php b/public/system/library/template/Twig/Node/Expression/Unary/Pos.php
new file mode 100644
index 0000000..04edb52
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Expression/Unary/Pos.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Unary_Pos extends Twig_Node_Expression_Unary
+{
+    public function operator(Twig_Compiler $compiler)
+    {
+        $compiler->raw('+');
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Flush.php b/public/system/library/template/Twig/Node/Flush.php
new file mode 100644
index 0000000..2af17a4
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Flush.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a flush node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Flush extends Twig_Node
+{
+    public function __construct($lineno, $tag)
+    {
+        parent::__construct(array(), array(), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write("flush();\n")
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/For.php b/public/system/library/template/Twig/Node/For.php
new file mode 100644
index 0000000..2d45093
--- /dev/null
+++ b/public/system/library/template/Twig/Node/For.php
@@ -0,0 +1,106 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a for node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_For extends Twig_Node
+{
+    protected $loop;
+
+    public function __construct(Twig_Node_Expression_AssignName $keyTarget, Twig_Node_Expression_AssignName $valueTarget, Twig_Node_Expression $seq, Twig_Node_Expression $ifexpr = null, Twig_NodeInterface $body, Twig_NodeInterface $else = null, $lineno, $tag = null)
+    {
+        $body = new Twig_Node(array($body, $this->loop = new Twig_Node_ForLoop($lineno, $tag)));
+
+        if (null !== $ifexpr) {
+            $body = new Twig_Node_If(new Twig_Node(array($ifexpr, $body)), null, $lineno, $tag);
+        }
+
+        parent::__construct(array('key_target' => $keyTarget, 'value_target' => $valueTarget, 'seq' => $seq, 'body' => $body, 'else' => $else), array('with_loop' => true, 'ifexpr' => null !== $ifexpr), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write("\$context['_parent'] = \$context;\n")
+            ->write("\$context['_seq'] = twig_ensure_traversable(")
+            ->subcompile($this->getNode('seq'))
+            ->raw(");\n")
+        ;
+
+        if (null !== $this->getNode('else')) {
+            $compiler->write("\$context['_iterated'] = false;\n");
+        }
+
+        if ($this->getAttribute('with_loop')) {
+            $compiler
+                ->write("\$context['loop'] = array(\n")
+                ->write("  'parent' => \$context['_parent'],\n")
+                ->write("  'index0' => 0,\n")
+                ->write("  'index'  => 1,\n")
+                ->write("  'first'  => true,\n")
+                ->write(");\n")
+            ;
+
+            if (!$this->getAttribute('ifexpr')) {
+                $compiler
+                    ->write("if (is_array(\$context['_seq']) || (is_object(\$context['_seq']) && \$context['_seq'] instanceof Countable)) {\n")
+                    ->indent()
+                    ->write("\$length = count(\$context['_seq']);\n")
+                    ->write("\$context['loop']['revindex0'] = \$length - 1;\n")
+                    ->write("\$context['loop']['revindex'] = \$length;\n")
+                    ->write("\$context['loop']['length'] = \$length;\n")
+                    ->write("\$context['loop']['last'] = 1 === \$length;\n")
+                    ->outdent()
+                    ->write("}\n")
+                ;
+            }
+        }
+
+        $this->loop->setAttribute('else', null !== $this->getNode('else'));
+        $this->loop->setAttribute('with_loop', $this->getAttribute('with_loop'));
+        $this->loop->setAttribute('ifexpr', $this->getAttribute('ifexpr'));
+
+        $compiler
+            ->write("foreach (\$context['_seq'] as ")
+            ->subcompile($this->getNode('key_target'))
+            ->raw(' => ')
+            ->subcompile($this->getNode('value_target'))
+            ->raw(") {\n")
+            ->indent()
+            ->subcompile($this->getNode('body'))
+            ->outdent()
+            ->write("}\n")
+        ;
+
+        if (null !== $this->getNode('else')) {
+            $compiler
+                ->write("if (!\$context['_iterated']) {\n")
+                ->indent()
+                ->subcompile($this->getNode('else'))
+                ->outdent()
+                ->write("}\n")
+            ;
+        }
+
+        $compiler->write("\$_parent = \$context['_parent'];\n");
+
+        // remove some "private" loop variables (needed for nested loops)
+        $compiler->write('unset($context[\'_seq\'], $context[\'_iterated\'], $context[\''.$this->getNode('key_target')->getAttribute('name').'\'], $context[\''.$this->getNode('value_target')->getAttribute('name').'\'], $context[\'_parent\'], $context[\'loop\']);'."\n");
+
+        // keep the values set in the inner context for variables defined in the outer context
+        $compiler->write("\$context = array_intersect_key(\$context, \$_parent) + \$_parent;\n");
+    }
+}
diff --git a/public/system/library/template/Twig/Node/ForLoop.php b/public/system/library/template/Twig/Node/ForLoop.php
new file mode 100644
index 0000000..2554d48
--- /dev/null
+++ b/public/system/library/template/Twig/Node/ForLoop.php
@@ -0,0 +1,50 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Internal node used by the for node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_ForLoop extends Twig_Node
+{
+    public function __construct($lineno, $tag = null)
+    {
+        parent::__construct(array(), array('with_loop' => false, 'ifexpr' => false, 'else' => false), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        if ($this->getAttribute('else')) {
+            $compiler->write("\$context['_iterated'] = true;\n");
+        }
+
+        if ($this->getAttribute('with_loop')) {
+            $compiler
+                ->write("++\$context['loop']['index0'];\n")
+                ->write("++\$context['loop']['index'];\n")
+                ->write("\$context['loop']['first'] = false;\n")
+            ;
+
+            if (!$this->getAttribute('ifexpr')) {
+                $compiler
+                    ->write("if (isset(\$context['loop']['length'])) {\n")
+                    ->indent()
+                    ->write("--\$context['loop']['revindex0'];\n")
+                    ->write("--\$context['loop']['revindex'];\n")
+                    ->write("\$context['loop']['last'] = 0 === \$context['loop']['revindex0'];\n")
+                    ->outdent()
+                    ->write("}\n")
+                ;
+            }
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/Node/If.php b/public/system/library/template/Twig/Node/If.php
new file mode 100644
index 0000000..caff936
--- /dev/null
+++ b/public/system/library/template/Twig/Node/If.php
@@ -0,0 +1,61 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents an if node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_If extends Twig_Node
+{
+    public function __construct(Twig_NodeInterface $tests, Twig_NodeInterface $else = null, $lineno, $tag = null)
+    {
+        parent::__construct(array('tests' => $tests, 'else' => $else), array(), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->addDebugInfo($this);
+        for ($i = 0, $count = count($this->getNode('tests')); $i < $count; $i += 2) {
+            if ($i > 0) {
+                $compiler
+                    ->outdent()
+                    ->write('} elseif (')
+                ;
+            } else {
+                $compiler
+                    ->write('if (')
+                ;
+            }
+
+            $compiler
+                ->subcompile($this->getNode('tests')->getNode($i))
+                ->raw(") {\n")
+                ->indent()
+                ->subcompile($this->getNode('tests')->getNode($i + 1))
+            ;
+        }
+
+        if ($this->hasNode('else') && null !== $this->getNode('else')) {
+            $compiler
+                ->outdent()
+                ->write("} else {\n")
+                ->indent()
+                ->subcompile($this->getNode('else'))
+            ;
+        }
+
+        $compiler
+            ->outdent()
+            ->write("}\n");
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Import.php b/public/system/library/template/Twig/Node/Import.php
new file mode 100644
index 0000000..df37af3
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Import.php
@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents an import node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Import extends Twig_Node
+{
+    public function __construct(Twig_Node_Expression $expr, Twig_Node_Expression $var, $lineno, $tag = null)
+    {
+        parent::__construct(array('expr' => $expr, 'var' => $var), array(), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write('')
+            ->subcompile($this->getNode('var'))
+            ->raw(' = ')
+        ;
+
+        if ($this->getNode('expr') instanceof Twig_Node_Expression_Name && '_self' === $this->getNode('expr')->getAttribute('name')) {
+            $compiler->raw('$this');
+        } else {
+            $compiler
+                ->raw('$this->loadTemplate(')
+                ->subcompile($this->getNode('expr'))
+                ->raw(', ')
+                ->repr($compiler->getFilename())
+                ->raw(', ')
+                ->repr($this->getLine())
+                ->raw(')')
+            ;
+        }
+
+        $compiler->raw(";\n");
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Include.php b/public/system/library/template/Twig/Node/Include.php
new file mode 100644
index 0000000..9952f73
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Include.php
@@ -0,0 +1,83 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents an include node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Include extends Twig_Node implements Twig_NodeOutputInterface
+{
+    public function __construct(Twig_Node_Expression $expr, Twig_Node_Expression $variables = null, $only = false, $ignoreMissing = false, $lineno, $tag = null)
+    {
+        parent::__construct(array('expr' => $expr, 'variables' => $variables), array('only' => (bool) $only, 'ignore_missing' => (bool) $ignoreMissing), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->addDebugInfo($this);
+
+        if ($this->getAttribute('ignore_missing')) {
+            $compiler
+                ->write("try {\n")
+                ->indent()
+            ;
+        }
+
+        $this->addGetTemplate($compiler);
+
+        $compiler->raw('->display(');
+
+        $this->addTemplateArguments($compiler);
+
+        $compiler->raw(");\n");
+
+        if ($this->getAttribute('ignore_missing')) {
+            $compiler
+                ->outdent()
+                ->write("} catch (Twig_Error_Loader \$e) {\n")
+                ->indent()
+                ->write("// ignore missing template\n")
+                ->outdent()
+                ->write("}\n\n")
+            ;
+        }
+    }
+
+    protected function addGetTemplate(Twig_Compiler $compiler)
+    {
+        $compiler
+             ->write('$this->loadTemplate(')
+             ->subcompile($this->getNode('expr'))
+             ->raw(', ')
+             ->repr($compiler->getFilename())
+             ->raw(', ')
+             ->repr($this->getLine())
+             ->raw(')')
+         ;
+    }
+
+    protected function addTemplateArguments(Twig_Compiler $compiler)
+    {
+        if (null === $this->getNode('variables')) {
+            $compiler->raw(false === $this->getAttribute('only') ? '$context' : 'array()');
+        } elseif (false === $this->getAttribute('only')) {
+            $compiler
+                ->raw('array_merge($context, ')
+                ->subcompile($this->getNode('variables'))
+                ->raw(')')
+            ;
+        } else {
+            $compiler->subcompile($this->getNode('variables'));
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Macro.php b/public/system/library/template/Twig/Node/Macro.php
new file mode 100644
index 0000000..c186cd0
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Macro.php
@@ -0,0 +1,123 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a macro node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Macro extends Twig_Node
+{
+    const VARARGS_NAME = 'varargs';
+
+    public function __construct($name, Twig_NodeInterface $body, Twig_NodeInterface $arguments, $lineno, $tag = null)
+    {
+        foreach ($arguments as $argumentName => $argument) {
+            if (self::VARARGS_NAME === $argumentName) {
+                throw new Twig_Error_Syntax(sprintf('The argument "%s" in macro "%s" cannot be defined because the variable "%s" is reserved for arbitrary arguments.', self::VARARGS_NAME, $name, self::VARARGS_NAME), $argument->getLine());
+            }
+        }
+
+        parent::__construct(array('body' => $body, 'arguments' => $arguments), array('name' => $name), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write(sprintf('public function get%s(', $this->getAttribute('name')))
+        ;
+
+        $count = count($this->getNode('arguments'));
+        $pos = 0;
+        foreach ($this->getNode('arguments') as $name => $default) {
+            $compiler
+                ->raw('$__'.$name.'__ = ')
+                ->subcompile($default)
+            ;
+
+            if (++$pos < $count) {
+                $compiler->raw(', ');
+            }
+        }
+
+        if (PHP_VERSION_ID >= 50600) {
+            if ($count) {
+                $compiler->raw(', ');
+            }
+
+            $compiler->raw('...$__varargs__');
+        }
+
+        $compiler
+            ->raw(")\n")
+            ->write("{\n")
+            ->indent()
+        ;
+
+        $compiler
+            ->write("\$context = \$this->env->mergeGlobals(array(\n")
+            ->indent()
+        ;
+
+        foreach ($this->getNode('arguments') as $name => $default) {
+            $compiler
+                ->addIndentation()
+                ->string($name)
+                ->raw(' => $__'.$name.'__')
+                ->raw(",\n")
+            ;
+        }
+
+        $compiler
+            ->addIndentation()
+            ->string(self::VARARGS_NAME)
+            ->raw(' => ')
+        ;
+
+        if (PHP_VERSION_ID >= 50600) {
+            $compiler->raw("\$__varargs__,\n");
+        } else {
+            $compiler
+                ->raw('func_num_args() > ')
+                ->repr($count)
+                ->raw(' ? array_slice(func_get_args(), ')
+                ->repr($count)
+                ->raw(") : array(),\n")
+            ;
+        }
+
+        $compiler
+            ->outdent()
+            ->write("));\n\n")
+            ->write("\$blocks = array();\n\n")
+            ->write("ob_start();\n")
+            ->write("try {\n")
+            ->indent()
+            ->subcompile($this->getNode('body'))
+            ->outdent()
+            ->write("} catch (Exception \$e) {\n")
+            ->indent()
+            ->write("ob_end_clean();\n\n")
+            ->write("throw \$e;\n")
+            ->outdent()
+            ->write("} catch (Throwable \$e) {\n")
+            ->indent()
+            ->write("ob_end_clean();\n\n")
+            ->write("throw \$e;\n")
+            ->outdent()
+            ->write("}\n\n")
+            ->write("return ('' === \$tmp = ob_get_clean()) ? '' : new Twig_Markup(\$tmp, \$this->env->getCharset());\n")
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Module.php b/public/system/library/template/Twig/Node/Module.php
new file mode 100644
index 0000000..01161d3
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Module.php
@@ -0,0 +1,403 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a module node.
+ *
+ * Consider this class as being final. If you need to customize the behavior of
+ * the generated class, consider adding nodes to the following nodes: display_start,
+ * display_end, constructor_start, constructor_end, and class_end.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Module extends Twig_Node
+{
+    public function __construct(Twig_NodeInterface $body, Twig_Node_Expression $parent = null, Twig_NodeInterface $blocks, Twig_NodeInterface $macros, Twig_NodeInterface $traits, $embeddedTemplates, $filename)
+    {
+        // embedded templates are set as attributes so that they are only visited once by the visitors
+        parent::__construct(array(
+            'parent' => $parent,
+            'body' => $body,
+            'blocks' => $blocks,
+            'macros' => $macros,
+            'traits' => $traits,
+            'display_start' => new Twig_Node(),
+            'display_end' => new Twig_Node(),
+            'constructor_start' => new Twig_Node(),
+            'constructor_end' => new Twig_Node(),
+            'class_end' => new Twig_Node(),
+        ), array(
+            'filename' => $filename,
+            'index' => null,
+            'embedded_templates' => $embeddedTemplates,
+        ), 1);
+    }
+
+    public function setIndex($index)
+    {
+        $this->setAttribute('index', $index);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $this->compileTemplate($compiler);
+
+        foreach ($this->getAttribute('embedded_templates') as $template) {
+            $compiler->subcompile($template);
+        }
+    }
+
+    protected function compileTemplate(Twig_Compiler $compiler)
+    {
+        if (!$this->getAttribute('index')) {
+            $compiler->write('<?php');
+        }
+
+        $this->compileClassHeader($compiler);
+
+        if (
+            count($this->getNode('blocks'))
+            || count($this->getNode('traits'))
+            || null === $this->getNode('parent')
+            || $this->getNode('parent') instanceof Twig_Node_Expression_Constant
+            || count($this->getNode('constructor_start'))
+            || count($this->getNode('constructor_end'))
+        ) {
+            $this->compileConstructor($compiler);
+        }
+
+        $this->compileGetParent($compiler);
+
+        $this->compileDisplay($compiler);
+
+        $compiler->subcompile($this->getNode('blocks'));
+
+        $this->compileMacros($compiler);
+
+        $this->compileGetTemplateName($compiler);
+
+        $this->compileIsTraitable($compiler);
+
+        $this->compileDebugInfo($compiler);
+
+        $this->compileClassFooter($compiler);
+    }
+
+    protected function compileGetParent(Twig_Compiler $compiler)
+    {
+        if (null === $parent = $this->getNode('parent')) {
+            return;
+        }
+
+        $compiler
+            ->write("protected function doGetParent(array \$context)\n", "{\n")
+            ->indent()
+            ->addDebugInfo($parent)
+            ->write('return ')
+        ;
+
+        if ($parent instanceof Twig_Node_Expression_Constant) {
+            $compiler->subcompile($parent);
+        } else {
+            $compiler
+                ->raw('$this->loadTemplate(')
+                ->subcompile($parent)
+                ->raw(', ')
+                ->repr($compiler->getFilename())
+                ->raw(', ')
+                ->repr($this->getNode('parent')->getLine())
+                ->raw(')')
+            ;
+        }
+
+        $compiler
+            ->raw(";\n")
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+
+    protected function compileClassHeader(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("\n\n")
+            // if the filename contains */, add a blank to avoid a PHP parse error
+            ->write('/* '.str_replace('*/', '* /', $this->getAttribute('filename'))." */\n")
+            ->write('class '.$compiler->getEnvironment()->getTemplateClass($this->getAttribute('filename'), $this->getAttribute('index')))
+            ->raw(sprintf(" extends %s\n", $compiler->getEnvironment()->getBaseTemplateClass()))
+            ->write("{\n")
+            ->indent()
+        ;
+    }
+
+    protected function compileConstructor(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("public function __construct(Twig_Environment \$env)\n", "{\n")
+            ->indent()
+            ->subcompile($this->getNode('constructor_start'))
+            ->write("parent::__construct(\$env);\n\n")
+        ;
+
+        // parent
+        if (null === $parent = $this->getNode('parent')) {
+            $compiler->write("\$this->parent = false;\n\n");
+        } elseif ($parent instanceof Twig_Node_Expression_Constant) {
+            $compiler
+                ->addDebugInfo($parent)
+                ->write('$this->parent = $this->loadTemplate(')
+                ->subcompile($parent)
+                ->raw(', ')
+                ->repr($compiler->getFilename())
+                ->raw(', ')
+                ->repr($this->getNode('parent')->getLine())
+                ->raw(");\n")
+            ;
+        }
+
+        $countTraits = count($this->getNode('traits'));
+        if ($countTraits) {
+            // traits
+            foreach ($this->getNode('traits') as $i => $trait) {
+                $this->compileLoadTemplate($compiler, $trait->getNode('template'), sprintf('$_trait_%s', $i));
+
+                $compiler
+                    ->addDebugInfo($trait->getNode('template'))
+                    ->write(sprintf("if (!\$_trait_%s->isTraitable()) {\n", $i))
+                    ->indent()
+                    ->write("throw new Twig_Error_Runtime('Template \"'.")
+                    ->subcompile($trait->getNode('template'))
+                    ->raw(".'\" cannot be used as a trait.');\n")
+                    ->outdent()
+                    ->write("}\n")
+                    ->write(sprintf("\$_trait_%s_blocks = \$_trait_%s->getBlocks();\n\n", $i, $i))
+                ;
+
+                foreach ($trait->getNode('targets') as $key => $value) {
+                    $compiler
+                        ->write(sprintf('if (!isset($_trait_%s_blocks[', $i))
+                        ->string($key)
+                        ->raw("])) {\n")
+                        ->indent()
+                        ->write("throw new Twig_Error_Runtime(sprintf('Block ")
+                        ->string($key)
+                        ->raw(' is not defined in trait ')
+                        ->subcompile($trait->getNode('template'))
+                        ->raw(".'));\n")
+                        ->outdent()
+                        ->write("}\n\n")
+
+                        ->write(sprintf('$_trait_%s_blocks[', $i))
+                        ->subcompile($value)
+                        ->raw(sprintf('] = $_trait_%s_blocks[', $i))
+                        ->string($key)
+                        ->raw(sprintf(']; unset($_trait_%s_blocks[', $i))
+                        ->string($key)
+                        ->raw("]);\n\n")
+                    ;
+                }
+            }
+
+            if ($countTraits > 1) {
+                $compiler
+                    ->write("\$this->traits = array_merge(\n")
+                    ->indent()
+                ;
+
+                for ($i = 0; $i < $countTraits; ++$i) {
+                    $compiler
+                        ->write(sprintf('$_trait_%s_blocks'.($i == $countTraits - 1 ? '' : ',')."\n", $i))
+                    ;
+                }
+
+                $compiler
+                    ->outdent()
+                    ->write(");\n\n")
+                ;
+            } else {
+                $compiler
+                    ->write("\$this->traits = \$_trait_0_blocks;\n\n")
+                ;
+            }
+
+            $compiler
+                ->write("\$this->blocks = array_merge(\n")
+                ->indent()
+                ->write("\$this->traits,\n")
+                ->write("array(\n")
+            ;
+        } else {
+            $compiler
+                ->write("\$this->blocks = array(\n")
+            ;
+        }
+
+        // blocks
+        $compiler
+            ->indent()
+        ;
+
+        foreach ($this->getNode('blocks') as $name => $node) {
+            $compiler
+                ->write(sprintf("'%s' => array(\$this, 'block_%s'),\n", $name, $name))
+            ;
+        }
+
+        if ($countTraits) {
+            $compiler
+                ->outdent()
+                ->write(")\n")
+            ;
+        }
+
+        $compiler
+            ->outdent()
+            ->write(");\n")
+            ->outdent()
+            ->subcompile($this->getNode('constructor_end'))
+            ->write("}\n\n")
+        ;
+    }
+
+    protected function compileDisplay(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("protected function doDisplay(array \$context, array \$blocks = array())\n", "{\n")
+            ->indent()
+            ->subcompile($this->getNode('display_start'))
+            ->subcompile($this->getNode('body'))
+        ;
+
+        if (null !== $parent = $this->getNode('parent')) {
+            $compiler->addDebugInfo($parent);
+            if ($parent instanceof Twig_Node_Expression_Constant) {
+                $compiler->write('$this->parent');
+            } else {
+                $compiler->write('$this->getParent($context)');
+            }
+            $compiler->raw("->display(\$context, array_merge(\$this->blocks, \$blocks));\n");
+        }
+
+        $compiler
+            ->subcompile($this->getNode('display_end'))
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+
+    protected function compileClassFooter(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->subcompile($this->getNode('class_end'))
+            ->outdent()
+            ->write("}\n")
+        ;
+    }
+
+    protected function compileMacros(Twig_Compiler $compiler)
+    {
+        $compiler->subcompile($this->getNode('macros'));
+    }
+
+    protected function compileGetTemplateName(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("public function getTemplateName()\n", "{\n")
+            ->indent()
+            ->write('return ')
+            ->repr($this->getAttribute('filename'))
+            ->raw(";\n")
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+
+    protected function compileIsTraitable(Twig_Compiler $compiler)
+    {
+        // A template can be used as a trait if:
+        //   * it has no parent
+        //   * it has no macros
+        //   * it has no body
+        //
+        // Put another way, a template can be used as a trait if it
+        // only contains blocks and use statements.
+        $traitable = null === $this->getNode('parent') && 0 === count($this->getNode('macros'));
+        if ($traitable) {
+            if ($this->getNode('body') instanceof Twig_Node_Body) {
+                $nodes = $this->getNode('body')->getNode(0);
+            } else {
+                $nodes = $this->getNode('body');
+            }
+
+            if (!count($nodes)) {
+                $nodes = new Twig_Node(array($nodes));
+            }
+
+            foreach ($nodes as $node) {
+                if (!count($node)) {
+                    continue;
+                }
+
+                if ($node instanceof Twig_Node_Text && ctype_space($node->getAttribute('data'))) {
+                    continue;
+                }
+
+                if ($node instanceof Twig_Node_BlockReference) {
+                    continue;
+                }
+
+                $traitable = false;
+                break;
+            }
+        }
+
+        if ($traitable) {
+            return;
+        }
+
+        $compiler
+            ->write("public function isTraitable()\n", "{\n")
+            ->indent()
+            ->write(sprintf("return %s;\n", $traitable ? 'true' : 'false'))
+            ->outdent()
+            ->write("}\n\n")
+        ;
+    }
+
+    protected function compileDebugInfo(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("public function getDebugInfo()\n", "{\n")
+            ->indent()
+            ->write(sprintf("return %s;\n", str_replace("\n", '', var_export(array_reverse($compiler->getDebugInfo(), true), true))))
+            ->outdent()
+            ->write("}\n")
+        ;
+    }
+
+    protected function compileLoadTemplate(Twig_Compiler $compiler, $node, $var)
+    {
+        if ($node instanceof Twig_Node_Expression_Constant) {
+            $compiler
+                ->write(sprintf('%s = $this->loadTemplate(', $var))
+                ->subcompile($node)
+                ->raw(', ')
+                ->repr($compiler->getFilename())
+                ->raw(', ')
+                ->repr($node->getLine())
+                ->raw(");\n")
+            ;
+        } else {
+            throw new LogicException('Trait templates can only be constant nodes');
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Print.php b/public/system/library/template/Twig/Node/Print.php
new file mode 100644
index 0000000..7b69ee8
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Print.php
@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a node that outputs an expression.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Print extends Twig_Node implements Twig_NodeOutputInterface
+{
+    public function __construct(Twig_Node_Expression $expr, $lineno, $tag = null)
+    {
+        parent::__construct(array('expr' => $expr), array(), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write('echo ')
+            ->subcompile($this->getNode('expr'))
+            ->raw(";\n")
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Sandbox.php b/public/system/library/template/Twig/Node/Sandbox.php
new file mode 100644
index 0000000..cd705e2
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Sandbox.php
@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a sandbox node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Sandbox extends Twig_Node
+{
+    public function __construct(Twig_NodeInterface $body, $lineno, $tag = null)
+    {
+        parent::__construct(array('body' => $body), array(), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write("\$sandbox = \$this->env->getExtension('sandbox');\n")
+            ->write("if (!\$alreadySandboxed = \$sandbox->isSandboxed()) {\n")
+            ->indent()
+            ->write("\$sandbox->enableSandbox();\n")
+            ->outdent()
+            ->write("}\n")
+            ->subcompile($this->getNode('body'))
+            ->write("if (!\$alreadySandboxed) {\n")
+            ->indent()
+            ->write("\$sandbox->disableSandbox();\n")
+            ->outdent()
+            ->write("}\n")
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/SandboxedPrint.php b/public/system/library/template/Twig/Node/SandboxedPrint.php
new file mode 100644
index 0000000..148dd2b
--- /dev/null
+++ b/public/system/library/template/Twig/Node/SandboxedPrint.php
@@ -0,0 +1,51 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_Node_SandboxedPrint adds a check for the __toString() method
+ * when the variable is an object and the sandbox is activated.
+ *
+ * When there is a simple Print statement, like {{ article }},
+ * and if the sandbox is enabled, we need to check that the __toString()
+ * method is allowed if 'article' is an object.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_SandboxedPrint extends Twig_Node_Print
+{
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write('echo $this->env->getExtension(\'sandbox\')->ensureToStringAllowed(')
+            ->subcompile($this->getNode('expr'))
+            ->raw(");\n")
+        ;
+    }
+
+    /**
+     * Removes node filters.
+     *
+     * This is mostly needed when another visitor adds filters (like the escaper one).
+     *
+     * @param Twig_Node $node A Node
+     *
+     * @return Twig_Node
+     */
+    protected function removeNodeFilter($node)
+    {
+        if ($node instanceof Twig_Node_Expression_Filter) {
+            return $this->removeNodeFilter($node->getNode('node'));
+        }
+
+        return $node;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Set.php b/public/system/library/template/Twig/Node/Set.php
new file mode 100644
index 0000000..e5a6603
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Set.php
@@ -0,0 +1,96 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a set node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Set extends Twig_Node
+{
+    public function __construct($capture, Twig_NodeInterface $names, Twig_NodeInterface $values, $lineno, $tag = null)
+    {
+        parent::__construct(array('names' => $names, 'values' => $values), array('capture' => $capture, 'safe' => false), $lineno, $tag);
+
+        /*
+         * Optimizes the node when capture is used for a large block of text.
+         *
+         * {% set foo %}foo{% endset %} is compiled to $context['foo'] = new Twig_Markup("foo");
+         */
+        if ($this->getAttribute('capture')) {
+            $this->setAttribute('safe', true);
+
+            $values = $this->getNode('values');
+            if ($values instanceof Twig_Node_Text) {
+                $this->setNode('values', new Twig_Node_Expression_Constant($values->getAttribute('data'), $values->getLine()));
+                $this->setAttribute('capture', false);
+            }
+        }
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler->addDebugInfo($this);
+
+        if (count($this->getNode('names')) > 1) {
+            $compiler->write('list(');
+            foreach ($this->getNode('names') as $idx => $node) {
+                if ($idx) {
+                    $compiler->raw(', ');
+                }
+
+                $compiler->subcompile($node);
+            }
+            $compiler->raw(')');
+        } else {
+            if ($this->getAttribute('capture')) {
+                $compiler
+                    ->write("ob_start();\n")
+                    ->subcompile($this->getNode('values'))
+                ;
+            }
+
+            $compiler->subcompile($this->getNode('names'), false);
+
+            if ($this->getAttribute('capture')) {
+                $compiler->raw(" = ('' === \$tmp = ob_get_clean()) ? '' : new Twig_Markup(\$tmp, \$this->env->getCharset())");
+            }
+        }
+
+        if (!$this->getAttribute('capture')) {
+            $compiler->raw(' = ');
+
+            if (count($this->getNode('names')) > 1) {
+                $compiler->write('array(');
+                foreach ($this->getNode('values') as $idx => $value) {
+                    if ($idx) {
+                        $compiler->raw(', ');
+                    }
+
+                    $compiler->subcompile($value);
+                }
+                $compiler->raw(')');
+            } else {
+                if ($this->getAttribute('safe')) {
+                    $compiler
+                        ->raw("('' === \$tmp = ")
+                        ->subcompile($this->getNode('values'))
+                        ->raw(") ? '' : new Twig_Markup(\$tmp, \$this->env->getCharset())")
+                    ;
+                } else {
+                    $compiler->subcompile($this->getNode('values'));
+                }
+            }
+        }
+
+        $compiler->raw(";\n");
+    }
+}
diff --git a/public/system/library/template/Twig/Node/SetTemp.php b/public/system/library/template/Twig/Node/SetTemp.php
new file mode 100644
index 0000000..3bdd1cb
--- /dev/null
+++ b/public/system/library/template/Twig/Node/SetTemp.php
@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_Node_SetTemp extends Twig_Node
+{
+    public function __construct($name, $lineno)
+    {
+        parent::__construct(array(), array('name' => $name), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $name = $this->getAttribute('name');
+        $compiler
+            ->addDebugInfo($this)
+            ->write('if (isset($context[')
+            ->string($name)
+            ->raw('])) { $_')
+            ->raw($name)
+            ->raw('_ = $context[')
+            ->repr($name)
+            ->raw(']; } else { $_')
+            ->raw($name)
+            ->raw("_ = null; }\n")
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Spaceless.php b/public/system/library/template/Twig/Node/Spaceless.php
new file mode 100644
index 0000000..486e461
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Spaceless.php
@@ -0,0 +1,35 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a spaceless node.
+ *
+ * It removes spaces between HTML tags.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Spaceless extends Twig_Node
+{
+    public function __construct(Twig_NodeInterface $body, $lineno, $tag = 'spaceless')
+    {
+        parent::__construct(array('body' => $body), array(), $lineno, $tag);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write("ob_start();\n")
+            ->subcompile($this->getNode('body'))
+            ->write("echo trim(preg_replace('/>\s+</', '><', ob_get_clean()));\n")
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Node/Text.php b/public/system/library/template/Twig/Node/Text.php
new file mode 100644
index 0000000..39879bb
--- /dev/null
+++ b/public/system/library/template/Twig/Node/Text.php
@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a text node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Node_Text extends Twig_Node implements Twig_NodeOutputInterface
+{
+    public function __construct($data, $lineno)
+    {
+        parent::__construct(array(), array('data' => $data), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->addDebugInfo($this)
+            ->write('echo ')
+            ->string($this->getAttribute('data'))
+            ->raw(";\n")
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/NodeInterface.php b/public/system/library/template/Twig/NodeInterface.php
new file mode 100644
index 0000000..8077349
--- /dev/null
+++ b/public/system/library/template/Twig/NodeInterface.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a node in the AST.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 3.0)
+ */
+interface Twig_NodeInterface extends Countable, IteratorAggregate
+{
+    /**
+     * Compiles the node to PHP.
+     *
+     * @param Twig_Compiler $compiler A Twig_Compiler instance
+     */
+    public function compile(Twig_Compiler $compiler);
+
+    public function getLine();
+
+    public function getNodeTag();
+}
diff --git a/public/system/library/template/Twig/NodeOutputInterface.php b/public/system/library/template/Twig/NodeOutputInterface.php
new file mode 100644
index 0000000..22172c0
--- /dev/null
+++ b/public/system/library/template/Twig/NodeOutputInterface.php
@@ -0,0 +1,19 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a displayable node in the AST.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_NodeOutputInterface
+{
+}
diff --git a/public/system/library/template/Twig/NodeTraverser.php b/public/system/library/template/Twig/NodeTraverser.php
new file mode 100644
index 0000000..00f7b54
--- /dev/null
+++ b/public/system/library/template/Twig/NodeTraverser.php
@@ -0,0 +1,89 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_NodeTraverser is a node traverser.
+ *
+ * It visits all nodes and their children and calls the given visitor for each.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_NodeTraverser
+{
+    protected $env;
+    protected $visitors = array();
+
+    /**
+     * Constructor.
+     *
+     * @param Twig_Environment            $env      A Twig_Environment instance
+     * @param Twig_NodeVisitorInterface[] $visitors An array of Twig_NodeVisitorInterface instances
+     */
+    public function __construct(Twig_Environment $env, array $visitors = array())
+    {
+        $this->env = $env;
+        foreach ($visitors as $visitor) {
+            $this->addVisitor($visitor);
+        }
+    }
+
+    /**
+     * Adds a visitor.
+     *
+     * @param Twig_NodeVisitorInterface $visitor A Twig_NodeVisitorInterface instance
+     */
+    public function addVisitor(Twig_NodeVisitorInterface $visitor)
+    {
+        if (!isset($this->visitors[$visitor->getPriority()])) {
+            $this->visitors[$visitor->getPriority()] = array();
+        }
+
+        $this->visitors[$visitor->getPriority()][] = $visitor;
+    }
+
+    /**
+     * Traverses a node and calls the registered visitors.
+     *
+     * @param Twig_NodeInterface $node A Twig_NodeInterface instance
+     *
+     * @return Twig_NodeInterface
+     */
+    public function traverse(Twig_NodeInterface $node)
+    {
+        ksort($this->visitors);
+        foreach ($this->visitors as $visitors) {
+            foreach ($visitors as $visitor) {
+                $node = $this->traverseForVisitor($visitor, $node);
+            }
+        }
+
+        return $node;
+    }
+
+    protected function traverseForVisitor(Twig_NodeVisitorInterface $visitor, Twig_NodeInterface $node = null)
+    {
+        if (null === $node) {
+            return;
+        }
+
+        $node = $visitor->enterNode($node, $this->env);
+
+        foreach ($node as $k => $n) {
+            if (false !== $n = $this->traverseForVisitor($visitor, $n)) {
+                $node->setNode($k, $n);
+            } else {
+                $node->removeNode($k);
+            }
+        }
+
+        return $visitor->leaveNode($node, $this->env);
+    }
+}
diff --git a/public/system/library/template/Twig/NodeVisitor/Escaper.php b/public/system/library/template/Twig/NodeVisitor/Escaper.php
new file mode 100644
index 0000000..f7d01b3
--- /dev/null
+++ b/public/system/library/template/Twig/NodeVisitor/Escaper.php
@@ -0,0 +1,159 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_NodeVisitor_Escaper implements output escaping.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_NodeVisitor_Escaper extends Twig_BaseNodeVisitor
+{
+    protected $statusStack = array();
+    protected $blocks = array();
+    protected $safeAnalysis;
+    protected $traverser;
+    protected $defaultStrategy = false;
+    protected $safeVars = array();
+
+    public function __construct()
+    {
+        $this->safeAnalysis = new Twig_NodeVisitor_SafeAnalysis();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doEnterNode(Twig_Node $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Module) {
+            if ($env->hasExtension('escaper') && $defaultStrategy = $env->getExtension('escaper')->getDefaultStrategy($node->getAttribute('filename'))) {
+                $this->defaultStrategy = $defaultStrategy;
+            }
+            $this->safeVars = array();
+            $this->blocks = array();
+        } elseif ($node instanceof Twig_Node_AutoEscape) {
+            $this->statusStack[] = $node->getAttribute('value');
+        } elseif ($node instanceof Twig_Node_Block) {
+            $this->statusStack[] = isset($this->blocks[$node->getAttribute('name')]) ? $this->blocks[$node->getAttribute('name')] : $this->needEscaping($env);
+        } elseif ($node instanceof Twig_Node_Import) {
+            $this->safeVars[] = $node->getNode('var')->getAttribute('name');
+        }
+
+        return $node;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doLeaveNode(Twig_Node $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Module) {
+            $this->defaultStrategy = false;
+            $this->safeVars = array();
+            $this->blocks = array();
+        } elseif ($node instanceof Twig_Node_Expression_Filter) {
+            return $this->preEscapeFilterNode($node, $env);
+        } elseif ($node instanceof Twig_Node_Print) {
+            return $this->escapePrintNode($node, $env, $this->needEscaping($env));
+        }
+
+        if ($node instanceof Twig_Node_AutoEscape || $node instanceof Twig_Node_Block) {
+            array_pop($this->statusStack);
+        } elseif ($node instanceof Twig_Node_BlockReference) {
+            $this->blocks[$node->getAttribute('name')] = $this->needEscaping($env);
+        }
+
+        return $node;
+    }
+
+    protected function escapePrintNode(Twig_Node_Print $node, Twig_Environment $env, $type)
+    {
+        if (false === $type) {
+            return $node;
+        }
+
+        $expression = $node->getNode('expr');
+
+        if ($this->isSafeFor($type, $expression, $env)) {
+            return $node;
+        }
+
+        $class = get_class($node);
+
+        return new $class(
+            $this->getEscaperFilter($type, $expression),
+            $node->getLine()
+        );
+    }
+
+    protected function preEscapeFilterNode(Twig_Node_Expression_Filter $filter, Twig_Environment $env)
+    {
+        $name = $filter->getNode('filter')->getAttribute('value');
+
+        $type = $env->getFilter($name)->getPreEscape();
+        if (null === $type) {
+            return $filter;
+        }
+
+        $node = $filter->getNode('node');
+        if ($this->isSafeFor($type, $node, $env)) {
+            return $filter;
+        }
+
+        $filter->setNode('node', $this->getEscaperFilter($type, $node));
+
+        return $filter;
+    }
+
+    protected function isSafeFor($type, Twig_NodeInterface $expression, $env)
+    {
+        $safe = $this->safeAnalysis->getSafe($expression);
+
+        if (null === $safe) {
+            if (null === $this->traverser) {
+                $this->traverser = new Twig_NodeTraverser($env, array($this->safeAnalysis));
+            }
+
+            $this->safeAnalysis->setSafeVars($this->safeVars);
+
+            $this->traverser->traverse($expression);
+            $safe = $this->safeAnalysis->getSafe($expression);
+        }
+
+        return in_array($type, $safe) || in_array('all', $safe);
+    }
+
+    protected function needEscaping(Twig_Environment $env)
+    {
+        if (count($this->statusStack)) {
+            return $this->statusStack[count($this->statusStack) - 1];
+        }
+
+        return $this->defaultStrategy ? $this->defaultStrategy : false;
+    }
+
+    protected function getEscaperFilter($type, Twig_NodeInterface $node)
+    {
+        $line = $node->getLine();
+        $name = new Twig_Node_Expression_Constant('escape', $line);
+        $args = new Twig_Node(array(new Twig_Node_Expression_Constant((string) $type, $line), new Twig_Node_Expression_Constant(null, $line), new Twig_Node_Expression_Constant(true, $line)));
+
+        return new Twig_Node_Expression_Filter($node, $name, $args, $line);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return 0;
+    }
+}
diff --git a/public/system/library/template/Twig/NodeVisitor/Optimizer.php b/public/system/library/template/Twig/NodeVisitor/Optimizer.php
new file mode 100644
index 0000000..872b7fe
--- /dev/null
+++ b/public/system/library/template/Twig/NodeVisitor/Optimizer.php
@@ -0,0 +1,271 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_NodeVisitor_Optimizer tries to optimizes the AST.
+ *
+ * This visitor is always the last registered one.
+ *
+ * You can configure which optimizations you want to activate via the
+ * optimizer mode.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_NodeVisitor_Optimizer extends Twig_BaseNodeVisitor
+{
+    const OPTIMIZE_ALL = -1;
+    const OPTIMIZE_NONE = 0;
+    const OPTIMIZE_FOR = 2;
+    const OPTIMIZE_RAW_FILTER = 4;
+    const OPTIMIZE_VAR_ACCESS = 8;
+
+    protected $loops = array();
+    protected $loopsTargets = array();
+    protected $optimizers;
+    protected $prependedNodes = array();
+    protected $inABody = false;
+
+    /**
+     * Constructor.
+     *
+     * @param int $optimizers The optimizer mode
+     */
+    public function __construct($optimizers = -1)
+    {
+        if (!is_int($optimizers) || $optimizers > (self::OPTIMIZE_FOR | self::OPTIMIZE_RAW_FILTER | self::OPTIMIZE_VAR_ACCESS)) {
+            throw new InvalidArgumentException(sprintf('Optimizer mode "%s" is not valid.', $optimizers));
+        }
+
+        $this->optimizers = $optimizers;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doEnterNode(Twig_Node $node, Twig_Environment $env)
+    {
+        if (self::OPTIMIZE_FOR === (self::OPTIMIZE_FOR & $this->optimizers)) {
+            $this->enterOptimizeFor($node, $env);
+        }
+
+        if (PHP_VERSION_ID < 50400 && self::OPTIMIZE_VAR_ACCESS === (self::OPTIMIZE_VAR_ACCESS & $this->optimizers) && !$env->isStrictVariables() && !$env->hasExtension('sandbox')) {
+            if ($this->inABody) {
+                if (!$node instanceof Twig_Node_Expression) {
+                    if (get_class($node) !== 'Twig_Node') {
+                        array_unshift($this->prependedNodes, array());
+                    }
+                } else {
+                    $node = $this->optimizeVariables($node, $env);
+                }
+            } elseif ($node instanceof Twig_Node_Body) {
+                $this->inABody = true;
+            }
+        }
+
+        return $node;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doLeaveNode(Twig_Node $node, Twig_Environment $env)
+    {
+        $expression = $node instanceof Twig_Node_Expression;
+
+        if (self::OPTIMIZE_FOR === (self::OPTIMIZE_FOR & $this->optimizers)) {
+            $this->leaveOptimizeFor($node, $env);
+        }
+
+        if (self::OPTIMIZE_RAW_FILTER === (self::OPTIMIZE_RAW_FILTER & $this->optimizers)) {
+            $node = $this->optimizeRawFilter($node, $env);
+        }
+
+        $node = $this->optimizePrintNode($node, $env);
+
+        if (self::OPTIMIZE_VAR_ACCESS === (self::OPTIMIZE_VAR_ACCESS & $this->optimizers) && !$env->isStrictVariables() && !$env->hasExtension('sandbox')) {
+            if ($node instanceof Twig_Node_Body) {
+                $this->inABody = false;
+            } elseif ($this->inABody) {
+                if (!$expression && get_class($node) !== 'Twig_Node' && $prependedNodes = array_shift($this->prependedNodes)) {
+                    $nodes = array();
+                    foreach (array_unique($prependedNodes) as $name) {
+                        $nodes[] = new Twig_Node_SetTemp($name, $node->getLine());
+                    }
+
+                    $nodes[] = $node;
+                    $node = new Twig_Node($nodes);
+                }
+            }
+        }
+
+        return $node;
+    }
+
+    protected function optimizeVariables(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if ('Twig_Node_Expression_Name' === get_class($node) && $node->isSimple()) {
+            $this->prependedNodes[0][] = $node->getAttribute('name');
+
+            return new Twig_Node_Expression_TempName($node->getAttribute('name'), $node->getLine());
+        }
+
+        return $node;
+    }
+
+    /**
+     * Optimizes print nodes.
+     *
+     * It replaces:
+     *
+     *   * "echo $this->render(Parent)Block()" with "$this->display(Parent)Block()"
+     *
+     * @param Twig_NodeInterface $node A Node
+     * @param Twig_Environment   $env  The current Twig environment
+     *
+     * @return Twig_NodeInterface
+     */
+    protected function optimizePrintNode(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if (!$node instanceof Twig_Node_Print) {
+            return $node;
+        }
+
+        if (
+            $node->getNode('expr') instanceof Twig_Node_Expression_BlockReference ||
+            $node->getNode('expr') instanceof Twig_Node_Expression_Parent
+        ) {
+            $node->getNode('expr')->setAttribute('output', true);
+
+            return $node->getNode('expr');
+        }
+
+        return $node;
+    }
+
+    /**
+     * Removes "raw" filters.
+     *
+     * @param Twig_NodeInterface $node A Node
+     * @param Twig_Environment   $env  The current Twig environment
+     *
+     * @return Twig_NodeInterface
+     */
+    protected function optimizeRawFilter(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Expression_Filter && 'raw' == $node->getNode('filter')->getAttribute('value')) {
+            return $node->getNode('node');
+        }
+
+        return $node;
+    }
+
+    /**
+     * Optimizes "for" tag by removing the "loop" variable creation whenever possible.
+     *
+     * @param Twig_NodeInterface $node A Node
+     * @param Twig_Environment   $env  The current Twig environment
+     */
+    protected function enterOptimizeFor(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_For) {
+            // disable the loop variable by default
+            $node->setAttribute('with_loop', false);
+            array_unshift($this->loops, $node);
+            array_unshift($this->loopsTargets, $node->getNode('value_target')->getAttribute('name'));
+            array_unshift($this->loopsTargets, $node->getNode('key_target')->getAttribute('name'));
+        } elseif (!$this->loops) {
+            // we are outside a loop
+            return;
+        }
+
+        // when do we need to add the loop variable back?
+
+        // the loop variable is referenced for the current loop
+        elseif ($node instanceof Twig_Node_Expression_Name && 'loop' === $node->getAttribute('name')) {
+            $node->setAttribute('always_defined', true);
+            $this->addLoopToCurrent();
+        }
+
+        // optimize access to loop targets
+        elseif ($node instanceof Twig_Node_Expression_Name && in_array($node->getAttribute('name'), $this->loopsTargets)) {
+            $node->setAttribute('always_defined', true);
+        }
+
+        // block reference
+        elseif ($node instanceof Twig_Node_BlockReference || $node instanceof Twig_Node_Expression_BlockReference) {
+            $this->addLoopToCurrent();
+        }
+
+        // include without the only attribute
+        elseif ($node instanceof Twig_Node_Include && !$node->getAttribute('only')) {
+            $this->addLoopToAll();
+        }
+
+        // include function without the with_context=false parameter
+        elseif ($node instanceof Twig_Node_Expression_Function
+            && 'include' === $node->getAttribute('name')
+            && (!$node->getNode('arguments')->hasNode('with_context')
+                 || false !== $node->getNode('arguments')->getNode('with_context')->getAttribute('value')
+               )
+        ) {
+            $this->addLoopToAll();
+        }
+
+        // the loop variable is referenced via an attribute
+        elseif ($node instanceof Twig_Node_Expression_GetAttr
+            && (!$node->getNode('attribute') instanceof Twig_Node_Expression_Constant
+                || 'parent' === $node->getNode('attribute')->getAttribute('value')
+               )
+            && (true === $this->loops[0]->getAttribute('with_loop')
+                || ($node->getNode('node') instanceof Twig_Node_Expression_Name
+                    && 'loop' === $node->getNode('node')->getAttribute('name')
+                   )
+               )
+        ) {
+            $this->addLoopToAll();
+        }
+    }
+
+    /**
+     * Optimizes "for" tag by removing the "loop" variable creation whenever possible.
+     *
+     * @param Twig_NodeInterface $node A Node
+     * @param Twig_Environment   $env  The current Twig environment
+     */
+    protected function leaveOptimizeFor(Twig_NodeInterface $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_For) {
+            array_shift($this->loops);
+            array_shift($this->loopsTargets);
+            array_shift($this->loopsTargets);
+        }
+    }
+
+    protected function addLoopToCurrent()
+    {
+        $this->loops[0]->setAttribute('with_loop', true);
+    }
+
+    protected function addLoopToAll()
+    {
+        foreach ($this->loops as $loop) {
+            $loop->setAttribute('with_loop', true);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return 255;
+    }
+}
diff --git a/public/system/library/template/Twig/NodeVisitor/SafeAnalysis.php b/public/system/library/template/Twig/NodeVisitor/SafeAnalysis.php
new file mode 100644
index 0000000..439f5bf
--- /dev/null
+++ b/public/system/library/template/Twig/NodeVisitor/SafeAnalysis.php
@@ -0,0 +1,154 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Twig_NodeVisitor_SafeAnalysis extends Twig_BaseNodeVisitor
+{
+    protected $data = array();
+    protected $safeVars = array();
+
+    public function setSafeVars($safeVars)
+    {
+        $this->safeVars = $safeVars;
+    }
+
+    public function getSafe(Twig_NodeInterface $node)
+    {
+        $hash = spl_object_hash($node);
+        if (!isset($this->data[$hash])) {
+            return;
+        }
+
+        foreach ($this->data[$hash] as $bucket) {
+            if ($bucket['key'] !== $node) {
+                continue;
+            }
+
+            if (in_array('html_attr', $bucket['value'])) {
+                $bucket['value'][] = 'html';
+            }
+
+            return $bucket['value'];
+        }
+    }
+
+    protected function setSafe(Twig_NodeInterface $node, array $safe)
+    {
+        $hash = spl_object_hash($node);
+        if (isset($this->data[$hash])) {
+            foreach ($this->data[$hash] as &$bucket) {
+                if ($bucket['key'] === $node) {
+                    $bucket['value'] = $safe;
+
+                    return;
+                }
+            }
+        }
+        $this->data[$hash][] = array(
+            'key' => $node,
+            'value' => $safe,
+        );
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doEnterNode(Twig_Node $node, Twig_Environment $env)
+    {
+        return $node;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doLeaveNode(Twig_Node $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Expression_Constant) {
+            // constants are marked safe for all
+            $this->setSafe($node, array('all'));
+        } elseif ($node instanceof Twig_Node_Expression_BlockReference) {
+            // blocks are safe by definition
+            $this->setSafe($node, array('all'));
+        } elseif ($node instanceof Twig_Node_Expression_Parent) {
+            // parent block is safe by definition
+            $this->setSafe($node, array('all'));
+        } elseif ($node instanceof Twig_Node_Expression_Conditional) {
+            // intersect safeness of both operands
+            $safe = $this->intersectSafe($this->getSafe($node->getNode('expr2')), $this->getSafe($node->getNode('expr3')));
+            $this->setSafe($node, $safe);
+        } elseif ($node instanceof Twig_Node_Expression_Filter) {
+            // filter expression is safe when the filter is safe
+            $name = $node->getNode('filter')->getAttribute('value');
+            $args = $node->getNode('arguments');
+            if (false !== $filter = $env->getFilter($name)) {
+                $safe = $filter->getSafe($args);
+                if (null === $safe) {
+                    $safe = $this->intersectSafe($this->getSafe($node->getNode('node')), $filter->getPreservesSafety());
+                }
+                $this->setSafe($node, $safe);
+            } else {
+                $this->setSafe($node, array());
+            }
+        } elseif ($node instanceof Twig_Node_Expression_Function) {
+            // function expression is safe when the function is safe
+            $name = $node->getAttribute('name');
+            $args = $node->getNode('arguments');
+            $function = $env->getFunction($name);
+            if (false !== $function) {
+                $this->setSafe($node, $function->getSafe($args));
+            } else {
+                $this->setSafe($node, array());
+            }
+        } elseif ($node instanceof Twig_Node_Expression_MethodCall) {
+            if ($node->getAttribute('safe')) {
+                $this->setSafe($node, array('all'));
+            } else {
+                $this->setSafe($node, array());
+            }
+        } elseif ($node instanceof Twig_Node_Expression_GetAttr && $node->getNode('node') instanceof Twig_Node_Expression_Name) {
+            $name = $node->getNode('node')->getAttribute('name');
+            // attributes on template instances are safe
+            if ('_self' == $name || in_array($name, $this->safeVars)) {
+                $this->setSafe($node, array('all'));
+            } else {
+                $this->setSafe($node, array());
+            }
+        } else {
+            $this->setSafe($node, array());
+        }
+
+        return $node;
+    }
+
+    protected function intersectSafe(array $a = null, array $b = null)
+    {
+        if (null === $a || null === $b) {
+            return array();
+        }
+
+        if (in_array('all', $a)) {
+            return $b;
+        }
+
+        if (in_array('all', $b)) {
+            return $a;
+        }
+
+        return array_intersect($a, $b);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return 0;
+    }
+}
diff --git a/public/system/library/template/Twig/NodeVisitor/Sandbox.php b/public/system/library/template/Twig/NodeVisitor/Sandbox.php
new file mode 100644
index 0000000..7f1b913
--- /dev/null
+++ b/public/system/library/template/Twig/NodeVisitor/Sandbox.php
@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_NodeVisitor_Sandbox implements sandboxing.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_NodeVisitor_Sandbox extends Twig_BaseNodeVisitor
+{
+    protected $inAModule = false;
+    protected $tags;
+    protected $filters;
+    protected $functions;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doEnterNode(Twig_Node $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Module) {
+            $this->inAModule = true;
+            $this->tags = array();
+            $this->filters = array();
+            $this->functions = array();
+
+            return $node;
+        } elseif ($this->inAModule) {
+            // look for tags
+            if ($node->getNodeTag() && !isset($this->tags[$node->getNodeTag()])) {
+                $this->tags[$node->getNodeTag()] = $node;
+            }
+
+            // look for filters
+            if ($node instanceof Twig_Node_Expression_Filter && !isset($this->filters[$node->getNode('filter')->getAttribute('value')])) {
+                $this->filters[$node->getNode('filter')->getAttribute('value')] = $node;
+            }
+
+            // look for functions
+            if ($node instanceof Twig_Node_Expression_Function && !isset($this->functions[$node->getAttribute('name')])) {
+                $this->functions[$node->getAttribute('name')] = $node;
+            }
+
+            // wrap print to check __toString() calls
+            if ($node instanceof Twig_Node_Print) {
+                return new Twig_Node_SandboxedPrint($node->getNode('expr'), $node->getLine(), $node->getNodeTag());
+            }
+        }
+
+        return $node;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doLeaveNode(Twig_Node $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Module) {
+            $this->inAModule = false;
+
+            $node->setNode('display_start', new Twig_Node(array(new Twig_Node_CheckSecurity($this->filters, $this->tags, $this->functions), $node->getNode('display_start'))));
+        }
+
+        return $node;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return 0;
+    }
+}
diff --git a/public/system/library/template/Twig/NodeVisitorInterface.php b/public/system/library/template/Twig/NodeVisitorInterface.php
new file mode 100644
index 0000000..f276163
--- /dev/null
+++ b/public/system/library/template/Twig/NodeVisitorInterface.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Twig_NodeVisitorInterface is the interface the all node visitor classes must implement.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_NodeVisitorInterface
+{
+    /**
+     * Called before child nodes are visited.
+     *
+     * @param Twig_NodeInterface $node The node to visit
+     * @param Twig_Environment   $env  The Twig environment instance
+     *
+     * @return Twig_NodeInterface The modified node
+     */
+    public function enterNode(Twig_NodeInterface $node, Twig_Environment $env);
+
+    /**
+     * Called after child nodes are visited.
+     *
+     * @param Twig_NodeInterface $node The node to visit
+     * @param Twig_Environment   $env  The Twig environment instance
+     *
+     * @return Twig_NodeInterface|false The modified node or false if the node must be removed
+     */
+    public function leaveNode(Twig_NodeInterface $node, Twig_Environment $env);
+
+    /**
+     * Returns the priority for this visitor.
+     *
+     * Priority should be between -10 and 10 (0 is the default).
+     *
+     * @return int The priority level
+     */
+    public function getPriority();
+}
diff --git a/public/system/library/template/Twig/Parser.php b/public/system/library/template/Twig/Parser.php
new file mode 100644
index 0000000..4628d67
--- /dev/null
+++ b/public/system/library/template/Twig/Parser.php
@@ -0,0 +1,399 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Default parser implementation.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Parser implements Twig_ParserInterface
+{
+    protected $stack = array();
+    protected $stream;
+    protected $parent;
+    protected $handlers;
+    protected $visitors;
+    protected $expressionParser;
+    protected $blocks;
+    protected $blockStack;
+    protected $macros;
+    protected $env;
+    protected $reservedMacroNames;
+    protected $importedSymbols;
+    protected $traits;
+    protected $embeddedTemplates = array();
+
+    /**
+     * Constructor.
+     *
+     * @param Twig_Environment $env A Twig_Environment instance
+     */
+    public function __construct(Twig_Environment $env)
+    {
+        $this->env = $env;
+    }
+
+    public function getEnvironment()
+    {
+        return $this->env;
+    }
+
+    public function getVarName()
+    {
+        return sprintf('__internal_%s', hash('sha256', uniqid(mt_rand(), true), false));
+    }
+
+    public function getFilename()
+    {
+        return $this->stream->getFilename();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function parse(Twig_TokenStream $stream, $test = null, $dropNeedle = false)
+    {
+        // push all variables into the stack to keep the current state of the parser
+        // using get_object_vars() instead of foreach would lead to https://bugs.php.net/71336
+        $vars = array();
+        foreach ($this as $k => $v) {
+            $vars[$k] = $v;
+        }
+
+        unset($vars['stack'], $vars['env'], $vars['handlers'], $vars['visitors'], $vars['expressionParser'], $vars['reservedMacroNames']);
+        $this->stack[] = $vars;
+
+        // tag handlers
+        if (null === $this->handlers) {
+            $this->handlers = $this->env->getTokenParsers();
+            $this->handlers->setParser($this);
+        }
+
+        // node visitors
+        if (null === $this->visitors) {
+            $this->visitors = $this->env->getNodeVisitors();
+        }
+
+        if (null === $this->expressionParser) {
+            $this->expressionParser = new Twig_ExpressionParser($this, $this->env->getUnaryOperators(), $this->env->getBinaryOperators());
+        }
+
+        $this->stream = $stream;
+        $this->parent = null;
+        $this->blocks = array();
+        $this->macros = array();
+        $this->traits = array();
+        $this->blockStack = array();
+        $this->importedSymbols = array(array());
+        $this->embeddedTemplates = array();
+
+        try {
+            $body = $this->subparse($test, $dropNeedle);
+
+            if (null !== $this->parent && null === $body = $this->filterBodyNodes($body)) {
+                $body = new Twig_Node();
+            }
+        } catch (Twig_Error_Syntax $e) {
+            if (!$e->getTemplateFile()) {
+                $e->setTemplateFile($this->getFilename());
+            }
+
+            if (!$e->getTemplateLine()) {
+                $e->setTemplateLine($this->stream->getCurrent()->getLine());
+            }
+
+            throw $e;
+        }
+
+        $node = new Twig_Node_Module(new Twig_Node_Body(array($body)), $this->parent, new Twig_Node($this->blocks), new Twig_Node($this->macros), new Twig_Node($this->traits), $this->embeddedTemplates, $this->getFilename());
+
+        $traverser = new Twig_NodeTraverser($this->env, $this->visitors);
+
+        $node = $traverser->traverse($node);
+
+        // restore previous stack so previous parse() call can resume working
+        foreach (array_pop($this->stack) as $key => $val) {
+            $this->$key = $val;
+        }
+
+        return $node;
+    }
+
+    public function subparse($test, $dropNeedle = false)
+    {
+        $lineno = $this->getCurrentToken()->getLine();
+        $rv = array();
+        while (!$this->stream->isEOF()) {
+            switch ($this->getCurrentToken()->getType()) {
+                case Twig_Token::TEXT_TYPE:
+                    $token = $this->stream->next();
+                    $rv[] = new Twig_Node_Text($token->getValue(), $token->getLine());
+                    break;
+
+                case Twig_Token::VAR_START_TYPE:
+                    $token = $this->stream->next();
+                    $expr = $this->expressionParser->parseExpression();
+                    $this->stream->expect(Twig_Token::VAR_END_TYPE);
+                    $rv[] = new Twig_Node_Print($expr, $token->getLine());
+                    break;
+
+                case Twig_Token::BLOCK_START_TYPE:
+                    $this->stream->next();
+                    $token = $this->getCurrentToken();
+
+                    if ($token->getType() !== Twig_Token::NAME_TYPE) {
+                        throw new Twig_Error_Syntax('A block must start with a tag name.', $token->getLine(), $this->getFilename());
+                    }
+
+                    if (null !== $test && call_user_func($test, $token)) {
+                        if ($dropNeedle) {
+                            $this->stream->next();
+                        }
+
+                        if (1 === count($rv)) {
+                            return $rv[0];
+                        }
+
+                        return new Twig_Node($rv, array(), $lineno);
+                    }
+
+                    $subparser = $this->handlers->getTokenParser($token->getValue());
+                    if (null === $subparser) {
+                        if (null !== $test) {
+                            $e = new Twig_Error_Syntax(sprintf('Unexpected "%s" tag', $token->getValue()), $token->getLine(), $this->getFilename());
+
+                            if (is_array($test) && isset($test[0]) && $test[0] instanceof Twig_TokenParserInterface) {
+                                $e->appendMessage(sprintf(' (expecting closing tag for the "%s" tag defined near line %s).', $test[0]->getTag(), $lineno));
+                            }
+                        } else {
+                            $e = new Twig_Error_Syntax(sprintf('Unknown "%s" tag.', $token->getValue()), $token->getLine(), $this->getFilename());
+                            $e->addSuggestions($token->getValue(), array_keys($this->env->getTags()));
+                        }
+
+                        throw $e;
+                    }
+
+                    $this->stream->next();
+
+                    $node = $subparser->parse($token);
+                    if (null !== $node) {
+                        $rv[] = $node;
+                    }
+                    break;
+
+                default:
+                    throw new Twig_Error_Syntax('Lexer or parser ended up in unsupported state.', 0, $this->getFilename());
+            }
+        }
+
+        if (1 === count($rv)) {
+            return $rv[0];
+        }
+
+        return new Twig_Node($rv, array(), $lineno);
+    }
+
+    public function addHandler($name, $class)
+    {
+        $this->handlers[$name] = $class;
+    }
+
+    public function addNodeVisitor(Twig_NodeVisitorInterface $visitor)
+    {
+        $this->visitors[] = $visitor;
+    }
+
+    public function getBlockStack()
+    {
+        return $this->blockStack;
+    }
+
+    public function peekBlockStack()
+    {
+        return $this->blockStack[count($this->blockStack) - 1];
+    }
+
+    public function popBlockStack()
+    {
+        array_pop($this->blockStack);
+    }
+
+    public function pushBlockStack($name)
+    {
+        $this->blockStack[] = $name;
+    }
+
+    public function hasBlock($name)
+    {
+        return isset($this->blocks[$name]);
+    }
+
+    public function getBlock($name)
+    {
+        return $this->blocks[$name];
+    }
+
+    public function setBlock($name, Twig_Node_Block $value)
+    {
+        $this->blocks[$name] = new Twig_Node_Body(array($value), array(), $value->getLine());
+    }
+
+    public function hasMacro($name)
+    {
+        return isset($this->macros[$name]);
+    }
+
+    public function setMacro($name, Twig_Node_Macro $node)
+    {
+        if ($this->isReservedMacroName($name)) {
+            throw new Twig_Error_Syntax(sprintf('"%s" cannot be used as a macro name as it is a reserved keyword.', $name), $node->getLine(), $this->getFilename());
+        }
+
+        $this->macros[$name] = $node;
+    }
+
+    public function isReservedMacroName($name)
+    {
+        if (null === $this->reservedMacroNames) {
+            $this->reservedMacroNames = array();
+            $r = new ReflectionClass($this->env->getBaseTemplateClass());
+            foreach ($r->getMethods() as $method) {
+                $methodName = strtolower($method->getName());
+
+                if ('get' === substr($methodName, 0, 3) && isset($methodName[3])) {
+                    $this->reservedMacroNames[] = substr($methodName, 3);
+                }
+            }
+        }
+
+        return in_array(strtolower($name), $this->reservedMacroNames);
+    }
+
+    public function addTrait($trait)
+    {
+        $this->traits[] = $trait;
+    }
+
+    public function hasTraits()
+    {
+        return count($this->traits) > 0;
+    }
+
+    public function embedTemplate(Twig_Node_Module $template)
+    {
+        $template->setIndex(mt_rand());
+
+        $this->embeddedTemplates[] = $template;
+    }
+
+    public function addImportedSymbol($type, $alias, $name = null, Twig_Node_Expression $node = null)
+    {
+        $this->importedSymbols[0][$type][$alias] = array('name' => $name, 'node' => $node);
+    }
+
+    public function getImportedSymbol($type, $alias)
+    {
+        foreach ($this->importedSymbols as $functions) {
+            if (isset($functions[$type][$alias])) {
+                return $functions[$type][$alias];
+            }
+        }
+    }
+
+    public function isMainScope()
+    {
+        return 1 === count($this->importedSymbols);
+    }
+
+    public function pushLocalScope()
+    {
+        array_unshift($this->importedSymbols, array());
+    }
+
+    public function popLocalScope()
+    {
+        array_shift($this->importedSymbols);
+    }
+
+    /**
+     * Gets the expression parser.
+     *
+     * @return Twig_ExpressionParser The expression parser
+     */
+    public function getExpressionParser()
+    {
+        return $this->expressionParser;
+    }
+
+    public function getParent()
+    {
+        return $this->parent;
+    }
+
+    public function setParent($parent)
+    {
+        $this->parent = $parent;
+    }
+
+    /**
+     * Gets the token stream.
+     *
+     * @return Twig_TokenStream The token stream
+     */
+    public function getStream()
+    {
+        return $this->stream;
+    }
+
+    /**
+     * Gets the current token.
+     *
+     * @return Twig_Token The current token
+     */
+    public function getCurrentToken()
+    {
+        return $this->stream->getCurrent();
+    }
+
+    protected function filterBodyNodes(Twig_NodeInterface $node)
+    {
+        // check that the body does not contain non-empty output nodes
+        if (
+            ($node instanceof Twig_Node_Text && !ctype_space($node->getAttribute('data')))
+            ||
+            (!$node instanceof Twig_Node_Text && !$node instanceof Twig_Node_BlockReference && $node instanceof Twig_NodeOutputInterface)
+        ) {
+            if (false !== strpos((string) $node, chr(0xEF).chr(0xBB).chr(0xBF))) {
+                throw new Twig_Error_Syntax('A template that extends another one cannot have a body but a byte order mark (BOM) has been detected; it must be removed.', $node->getLine(), $this->getFilename());
+            }
+
+            throw new Twig_Error_Syntax('A template that extends another one cannot have a body.', $node->getLine(), $this->getFilename());
+        }
+
+        // bypass "set" nodes as they "capture" the output
+        if ($node instanceof Twig_Node_Set) {
+            return $node;
+        }
+
+        if ($node instanceof Twig_NodeOutputInterface) {
+            return;
+        }
+
+        foreach ($node as $k => $n) {
+            if (null !== $n && null === $this->filterBodyNodes($n)) {
+                $node->removeNode($k);
+            }
+        }
+
+        return $node;
+    }
+}
diff --git a/public/system/library/template/Twig/ParserInterface.php b/public/system/library/template/Twig/ParserInterface.php
new file mode 100644
index 0000000..8e7cc0a
--- /dev/null
+++ b/public/system/library/template/Twig/ParserInterface.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by parser classes.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 3.0)
+ */
+interface Twig_ParserInterface
+{
+    /**
+     * Converts a token stream to a node tree.
+     *
+     * @param Twig_TokenStream $stream A token stream instance
+     *
+     * @return Twig_Node_Module A node tree
+     *
+     * @throws Twig_Error_Syntax When the token stream is syntactically or semantically wrong
+     */
+    public function parse(Twig_TokenStream $stream);
+}
diff --git a/public/system/library/template/Twig/Profiler/Dumper/Blackfire.php b/public/system/library/template/Twig/Profiler/Dumper/Blackfire.php
new file mode 100644
index 0000000..b82747a
--- /dev/null
+++ b/public/system/library/template/Twig/Profiler/Dumper/Blackfire.php
@@ -0,0 +1,68 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Profiler_Dumper_Blackfire
+{
+    public function dump(Twig_Profiler_Profile $profile)
+    {
+        $data = array();
+        $this->dumpProfile('main()', $profile, $data);
+        $this->dumpChildren('main()', $profile, $data);
+
+        $start = microtime(true);
+        $str = <<<EOF
+file-format: BlackfireProbe
+cost-dimensions: wt mu pmu
+request-start: {$start}
+
+
+EOF;
+
+        foreach ($data as $name => $values) {
+            $str .= "{$name}//{$values['ct']} {$values['wt']} {$values['mu']} {$values['pmu']}\n";
+        }
+
+        return $str;
+    }
+
+    private function dumpChildren($parent, Twig_Profiler_Profile $profile, &$data)
+    {
+        foreach ($profile as $p) {
+            if ($p->isTemplate()) {
+                $name = $p->getTemplate();
+            } else {
+                $name = sprintf('%s::%s(%s)', $p->getTemplate(), $p->getType(), $p->getName());
+            }
+            $this->dumpProfile(sprintf('%s==>%s', $parent, $name), $p, $data);
+            $this->dumpChildren($name, $p, $data);
+        }
+    }
+
+    private function dumpProfile($edge, Twig_Profiler_Profile $profile, &$data)
+    {
+        if (isset($data[$edge])) {
+            $data[$edge]['ct'] += 1;
+            $data[$edge]['wt'] += floor($profile->getDuration() * 1000000);
+            $data[$edge]['mu'] += $profile->getMemoryUsage();
+            $data[$edge]['pmu'] += $profile->getPeakMemoryUsage();
+        } else {
+            $data[$edge] = array(
+                'ct' => 1,
+                'wt' => floor($profile->getDuration() * 1000000),
+                'mu' => $profile->getMemoryUsage(),
+                'pmu' => $profile->getPeakMemoryUsage(),
+            );
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/Profiler/Dumper/Html.php b/public/system/library/template/Twig/Profiler/Dumper/Html.php
new file mode 100644
index 0000000..f066da7
--- /dev/null
+++ b/public/system/library/template/Twig/Profiler/Dumper/Html.php
@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Profiler_Dumper_Html extends Twig_Profiler_Dumper_Text
+{
+    private static $colors = array(
+        'block' => '#dfd',
+        'macro' => '#ddf',
+        'template' => '#ffd',
+        'big' => '#d44',
+    );
+
+    public function dump(Twig_Profiler_Profile $profile)
+    {
+        return '<pre>'.parent::dump($profile).'</pre>';
+    }
+
+    protected function formatTemplate(Twig_Profiler_Profile $profile, $prefix)
+    {
+        return sprintf('%s└ <span style="background-color: %s">%s</span>', $prefix, self::$colors['template'], $profile->getTemplate());
+    }
+
+    protected function formatNonTemplate(Twig_Profiler_Profile $profile, $prefix)
+    {
+        return sprintf('%s└ %s::%s(<span style="background-color: %s">%s</span>)', $prefix, $profile->getTemplate(), $profile->getType(), isset(self::$colors[$profile->getType()]) ? self::$colors[$profile->getType()] : 'auto', $profile->getName());
+    }
+
+    protected function formatTime(Twig_Profiler_Profile $profile, $percent)
+    {
+        return sprintf('<span style="color: %s">%.2fms/%.0f%%</span>', $percent > 20 ? self::$colors['big'] : 'auto', $profile->getDuration() * 1000, $percent);
+    }
+}
diff --git a/public/system/library/template/Twig/Profiler/Dumper/Text.php b/public/system/library/template/Twig/Profiler/Dumper/Text.php
new file mode 100644
index 0000000..998e210
--- /dev/null
+++ b/public/system/library/template/Twig/Profiler/Dumper/Text.php
@@ -0,0 +1,68 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Profiler_Dumper_Text
+{
+    private $root;
+
+    public function dump(Twig_Profiler_Profile $profile)
+    {
+        return $this->dumpProfile($profile);
+    }
+
+    protected function formatTemplate(Twig_Profiler_Profile $profile, $prefix)
+    {
+        return sprintf('%s└ %s', $prefix, $profile->getTemplate());
+    }
+
+    protected function formatNonTemplate(Twig_Profiler_Profile $profile, $prefix)
+    {
+        return sprintf('%s└ %s::%s(%s)', $prefix, $profile->getTemplate(), $profile->getType(), $profile->getName());
+    }
+
+    protected function formatTime(Twig_Profiler_Profile $profile, $percent)
+    {
+        return sprintf('%.2fms/%.0f%%', $profile->getDuration() * 1000, $percent);
+    }
+
+    private function dumpProfile(Twig_Profiler_Profile $profile, $prefix = '', $sibling = false)
+    {
+        if ($profile->isRoot()) {
+            $this->root = $profile->getDuration();
+            $start = $profile->getName();
+        } else {
+            if ($profile->isTemplate()) {
+                $start = $this->formatTemplate($profile, $prefix);
+            } else {
+                $start = $this->formatNonTemplate($profile, $prefix);
+            }
+            $prefix .= $sibling ? '│ ' : '  ';
+        }
+
+        $percent = $this->root ? $profile->getDuration() / $this->root * 100 : 0;
+
+        if ($profile->getDuration() * 1000 < 1) {
+            $str = $start."\n";
+        } else {
+            $str = sprintf("%s %s\n", $start, $this->formatTime($profile, $percent));
+        }
+
+        $nCount = count($profile->getProfiles());
+        foreach ($profile as $i => $p) {
+            $str .= $this->dumpProfile($p, $prefix, $i + 1 !== $nCount);
+        }
+
+        return $str;
+    }
+}
diff --git a/public/system/library/template/Twig/Profiler/Node/EnterProfile.php b/public/system/library/template/Twig/Profiler/Node/EnterProfile.php
new file mode 100644
index 0000000..2f97214
--- /dev/null
+++ b/public/system/library/template/Twig/Profiler/Node/EnterProfile.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a profile enter node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Profiler_Node_EnterProfile extends Twig_Node
+{
+    public function __construct($extensionName, $type, $name, $varName)
+    {
+        parent::__construct(array(), array('extension_name' => $extensionName, 'name' => $name, 'type' => $type, 'var_name' => $varName));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write(sprintf('$%s = $this->env->getExtension(', $this->getAttribute('var_name')))
+            ->repr($this->getAttribute('extension_name'))
+            ->raw(");\n")
+            ->write(sprintf('$%s->enter($%s = new Twig_Profiler_Profile($this->getTemplateName(), ', $this->getAttribute('var_name'), $this->getAttribute('var_name').'_prof'))
+            ->repr($this->getAttribute('type'))
+            ->raw(', ')
+            ->repr($this->getAttribute('name'))
+            ->raw("));\n\n")
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Profiler/Node/LeaveProfile.php b/public/system/library/template/Twig/Profiler/Node/LeaveProfile.php
new file mode 100644
index 0000000..88074c2
--- /dev/null
+++ b/public/system/library/template/Twig/Profiler/Node/LeaveProfile.php
@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a profile leave node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Profiler_Node_LeaveProfile extends Twig_Node
+{
+    public function __construct($varName)
+    {
+        parent::__construct(array(), array('var_name' => $varName));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function compile(Twig_Compiler $compiler)
+    {
+        $compiler
+            ->write("\n")
+            ->write(sprintf("\$%s->leave(\$%s);\n\n", $this->getAttribute('var_name'), $this->getAttribute('var_name').'_prof'))
+        ;
+    }
+}
diff --git a/public/system/library/template/Twig/Profiler/NodeVisitor/Profiler.php b/public/system/library/template/Twig/Profiler/NodeVisitor/Profiler.php
new file mode 100644
index 0000000..4b0baa8
--- /dev/null
+++ b/public/system/library/template/Twig/Profiler/NodeVisitor/Profiler.php
@@ -0,0 +1,72 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Profiler_NodeVisitor_Profiler extends Twig_BaseNodeVisitor
+{
+    private $extensionName;
+
+    public function __construct($extensionName)
+    {
+        $this->extensionName = $extensionName;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doEnterNode(Twig_Node $node, Twig_Environment $env)
+    {
+        return $node;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function doLeaveNode(Twig_Node $node, Twig_Environment $env)
+    {
+        if ($node instanceof Twig_Node_Module) {
+            $varName = $this->getVarName();
+            $node->setNode('display_start', new Twig_Node(array(new Twig_Profiler_Node_EnterProfile($this->extensionName, Twig_Profiler_Profile::TEMPLATE, $node->getAttribute('filename'), $varName), $node->getNode('display_start'))));
+            $node->setNode('display_end', new Twig_Node(array(new Twig_Profiler_Node_LeaveProfile($varName), $node->getNode('display_end'))));
+        } elseif ($node instanceof Twig_Node_Block) {
+            $varName = $this->getVarName();
+            $node->setNode('body', new Twig_Node_Body(array(
+                new Twig_Profiler_Node_EnterProfile($this->extensionName, Twig_Profiler_Profile::BLOCK, $node->getAttribute('name'), $varName),
+                $node->getNode('body'),
+                new Twig_Profiler_Node_LeaveProfile($varName),
+            )));
+        } elseif ($node instanceof Twig_Node_Macro) {
+            $varName = $this->getVarName();
+            $node->setNode('body', new Twig_Node_Body(array(
+                new Twig_Profiler_Node_EnterProfile($this->extensionName, Twig_Profiler_Profile::MACRO, $node->getAttribute('name'), $varName),
+                $node->getNode('body'),
+                new Twig_Profiler_Node_LeaveProfile($varName),
+            )));
+        }
+
+        return $node;
+    }
+
+    private function getVarName()
+    {
+        return sprintf('__internal_%s', hash('sha256', uniqid(mt_rand(), true), false));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return 0;
+    }
+}
diff --git a/public/system/library/template/Twig/Profiler/Profile.php b/public/system/library/template/Twig/Profiler/Profile.php
new file mode 100644
index 0000000..104bc05
--- /dev/null
+++ b/public/system/library/template/Twig/Profiler/Profile.php
@@ -0,0 +1,160 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2015 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Profiler_Profile implements IteratorAggregate, Serializable
+{
+    const ROOT = 'ROOT';
+    const BLOCK = 'block';
+    const TEMPLATE = 'template';
+    const MACRO = 'macro';
+
+    private $template;
+    private $name;
+    private $type;
+    private $starts = array();
+    private $ends = array();
+    private $profiles = array();
+
+    public function __construct($template = 'main', $type = self::ROOT, $name = 'main')
+    {
+        $this->template = $template;
+        $this->type = $type;
+        $this->name = 0 === strpos($name, '__internal_') ? 'INTERNAL' : $name;
+        $this->enter();
+    }
+
+    public function getTemplate()
+    {
+        return $this->template;
+    }
+
+    public function getType()
+    {
+        return $this->type;
+    }
+
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    public function isRoot()
+    {
+        return self::ROOT === $this->type;
+    }
+
+    public function isTemplate()
+    {
+        return self::TEMPLATE === $this->type;
+    }
+
+    public function isBlock()
+    {
+        return self::BLOCK === $this->type;
+    }
+
+    public function isMacro()
+    {
+        return self::MACRO === $this->type;
+    }
+
+    public function getProfiles()
+    {
+        return $this->profiles;
+    }
+
+    public function addProfile(Twig_Profiler_Profile $profile)
+    {
+        $this->profiles[] = $profile;
+    }
+
+    /**
+     * Returns the duration in microseconds.
+     *
+     * @return int
+     */
+    public function getDuration()
+    {
+        if ($this->isRoot() && $this->profiles) {
+            // for the root node with children, duration is the sum of all child durations
+            $duration = 0;
+            foreach ($this->profiles as $profile) {
+                $duration += $profile->getDuration();
+            }
+
+            return $duration;
+        }
+
+        return isset($this->ends['wt']) && isset($this->starts['wt']) ? $this->ends['wt'] - $this->starts['wt'] : 0;
+    }
+
+    /**
+     * Returns the memory usage in bytes.
+     *
+     * @return int
+     */
+    public function getMemoryUsage()
+    {
+        return isset($this->ends['mu']) && isset($this->starts['mu']) ? $this->ends['mu'] - $this->starts['mu'] : 0;
+    }
+
+    /**
+     * Returns the peak memory usage in bytes.
+     *
+     * @return int
+     */
+    public function getPeakMemoryUsage()
+    {
+        return isset($this->ends['pmu']) && isset($this->starts['pmu']) ? $this->ends['pmu'] - $this->starts['pmu'] : 0;
+    }
+
+    /**
+     * Starts the profiling.
+     */
+    public function enter()
+    {
+        $this->starts = array(
+            'wt' => microtime(true),
+            'mu' => memory_get_usage(),
+            'pmu' => memory_get_peak_usage(),
+        );
+    }
+
+    /**
+     * Stops the profiling.
+     */
+    public function leave()
+    {
+        $this->ends = array(
+            'wt' => microtime(true),
+            'mu' => memory_get_usage(),
+            'pmu' => memory_get_peak_usage(),
+        );
+    }
+
+    public function getIterator()
+    {
+        return new ArrayIterator($this->profiles);
+    }
+
+    public function serialize()
+    {
+        return serialize(array($this->template, $this->name, $this->type, $this->starts, $this->ends, $this->profiles));
+    }
+
+    public function unserialize($data)
+    {
+        list($this->template, $this->name, $this->type, $this->starts, $this->ends, $this->profiles) = unserialize($data);
+    }
+}
diff --git a/public/system/library/template/Twig/Sandbox/SecurityError.php b/public/system/library/template/Twig/Sandbox/SecurityError.php
new file mode 100644
index 0000000..015bfae
--- /dev/null
+++ b/public/system/library/template/Twig/Sandbox/SecurityError.php
@@ -0,0 +1,19 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Exception thrown when a security error occurs at runtime.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Sandbox_SecurityError extends Twig_Error
+{
+}
diff --git a/public/system/library/template/Twig/Sandbox/SecurityNotAllowedFilterError.php b/public/system/library/template/Twig/Sandbox/SecurityNotAllowedFilterError.php
new file mode 100644
index 0000000..99faba9
--- /dev/null
+++ b/public/system/library/template/Twig/Sandbox/SecurityNotAllowedFilterError.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Exception thrown when a not allowed filter is used in a template.
+ *
+ * @author Martin Hasoň <martin.hason@gmail.com>
+ */
+class Twig_Sandbox_SecurityNotAllowedFilterError extends Twig_Sandbox_SecurityError
+{
+    private $filterName;
+
+    public function __construct($message, $functionName, $lineno = -1, $filename = null, Exception $previous = null)
+    {
+        parent::__construct($message, $lineno, $filename, $previous);
+        $this->filterName = $functionName;
+    }
+
+    public function getFilterName()
+    {
+        return $this->filterName;
+    }
+}
diff --git a/public/system/library/template/Twig/Sandbox/SecurityNotAllowedFunctionError.php b/public/system/library/template/Twig/Sandbox/SecurityNotAllowedFunctionError.php
new file mode 100644
index 0000000..05cf488
--- /dev/null
+++ b/public/system/library/template/Twig/Sandbox/SecurityNotAllowedFunctionError.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Exception thrown when a not allowed function is used in a template.
+ *
+ * @author Martin Hasoň <martin.hason@gmail.com>
+ */
+class Twig_Sandbox_SecurityNotAllowedFunctionError extends Twig_Sandbox_SecurityError
+{
+    private $functionName;
+
+    public function __construct($message, $functionName, $lineno = -1, $filename = null, Exception $previous = null)
+    {
+        parent::__construct($message, $lineno, $filename, $previous);
+        $this->functionName = $functionName;
+    }
+
+    public function getFunctionName()
+    {
+        return $this->functionName;
+    }
+}
diff --git a/public/system/library/template/Twig/Sandbox/SecurityNotAllowedTagError.php b/public/system/library/template/Twig/Sandbox/SecurityNotAllowedTagError.php
new file mode 100644
index 0000000..b3bb5e8
--- /dev/null
+++ b/public/system/library/template/Twig/Sandbox/SecurityNotAllowedTagError.php
@@ -0,0 +1,31 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Exception thrown when a not allowed tag is used in a template.
+ *
+ * @author Martin Hasoň <martin.hason@gmail.com>
+ */
+class Twig_Sandbox_SecurityNotAllowedTagError extends Twig_Sandbox_SecurityError
+{
+    private $tagName;
+
+    public function __construct($message, $tagName, $lineno = -1, $filename = null, Exception $previous = null)
+    {
+        parent::__construct($message, $lineno, $filename, $previous);
+        $this->tagName = $tagName;
+    }
+
+    public function getTagName()
+    {
+        return $this->tagName;
+    }
+}
diff --git a/public/system/library/template/Twig/Sandbox/SecurityPolicy.php b/public/system/library/template/Twig/Sandbox/SecurityPolicy.php
new file mode 100644
index 0000000..c4dd03d
--- /dev/null
+++ b/public/system/library/template/Twig/Sandbox/SecurityPolicy.php
@@ -0,0 +1,119 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a security policy which need to be enforced when sandbox mode is enabled.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Sandbox_SecurityPolicy implements Twig_Sandbox_SecurityPolicyInterface
+{
+    protected $allowedTags;
+    protected $allowedFilters;
+    protected $allowedMethods;
+    protected $allowedProperties;
+    protected $allowedFunctions;
+
+    public function __construct(array $allowedTags = array(), array $allowedFilters = array(), array $allowedMethods = array(), array $allowedProperties = array(), array $allowedFunctions = array())
+    {
+        $this->allowedTags = $allowedTags;
+        $this->allowedFilters = $allowedFilters;
+        $this->setAllowedMethods($allowedMethods);
+        $this->allowedProperties = $allowedProperties;
+        $this->allowedFunctions = $allowedFunctions;
+    }
+
+    public function setAllowedTags(array $tags)
+    {
+        $this->allowedTags = $tags;
+    }
+
+    public function setAllowedFilters(array $filters)
+    {
+        $this->allowedFilters = $filters;
+    }
+
+    public function setAllowedMethods(array $methods)
+    {
+        $this->allowedMethods = array();
+        foreach ($methods as $class => $m) {
+            $this->allowedMethods[$class] = array_map('strtolower', is_array($m) ? $m : array($m));
+        }
+    }
+
+    public function setAllowedProperties(array $properties)
+    {
+        $this->allowedProperties = $properties;
+    }
+
+    public function setAllowedFunctions(array $functions)
+    {
+        $this->allowedFunctions = $functions;
+    }
+
+    public function checkSecurity($tags, $filters, $functions)
+    {
+        foreach ($tags as $tag) {
+            if (!in_array($tag, $this->allowedTags)) {
+                throw new Twig_Sandbox_SecurityNotAllowedTagError(sprintf('Tag "%s" is not allowed.', $tag), $tag);
+            }
+        }
+
+        foreach ($filters as $filter) {
+            if (!in_array($filter, $this->allowedFilters)) {
+                throw new Twig_Sandbox_SecurityNotAllowedFilterError(sprintf('Filter "%s" is not allowed.', $filter), $filter);
+            }
+        }
+
+        foreach ($functions as $function) {
+            if (!in_array($function, $this->allowedFunctions)) {
+                throw new Twig_Sandbox_SecurityNotAllowedFunctionError(sprintf('Function "%s" is not allowed.', $function), $function);
+            }
+        }
+    }
+
+    public function checkMethodAllowed($obj, $method)
+    {
+        if ($obj instanceof Twig_TemplateInterface || $obj instanceof Twig_Markup) {
+            return true;
+        }
+
+        $allowed = false;
+        $method = strtolower($method);
+        foreach ($this->allowedMethods as $class => $methods) {
+            if ($obj instanceof $class) {
+                $allowed = in_array($method, $methods);
+
+                break;
+            }
+        }
+
+        if (!$allowed) {
+            throw new Twig_Sandbox_SecurityError(sprintf('Calling "%s" method on a "%s" object is not allowed.', $method, get_class($obj)));
+        }
+    }
+
+    public function checkPropertyAllowed($obj, $property)
+    {
+        $allowed = false;
+        foreach ($this->allowedProperties as $class => $properties) {
+            if ($obj instanceof $class) {
+                $allowed = in_array($property, is_array($properties) ? $properties : array($properties));
+
+                break;
+            }
+        }
+
+        if (!$allowed) {
+            throw new Twig_Sandbox_SecurityError(sprintf('Calling "%s" property on a "%s" object is not allowed.', $property, get_class($obj)));
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/Sandbox/SecurityPolicyInterface.php b/public/system/library/template/Twig/Sandbox/SecurityPolicyInterface.php
new file mode 100644
index 0000000..6ab48e3
--- /dev/null
+++ b/public/system/library/template/Twig/Sandbox/SecurityPolicyInterface.php
@@ -0,0 +1,24 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interfaces that all security policy classes must implements.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_Sandbox_SecurityPolicyInterface
+{
+    public function checkSecurity($tags, $filters, $functions);
+
+    public function checkMethodAllowed($obj, $method);
+
+    public function checkPropertyAllowed($obj, $method);
+}
diff --git a/public/system/library/template/Twig/SimpleFilter.php b/public/system/library/template/Twig/SimpleFilter.php
new file mode 100644
index 0000000..0c1e092
--- /dev/null
+++ b/public/system/library/template/Twig/SimpleFilter.php
@@ -0,0 +1,117 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009-2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template filter.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_SimpleFilter
+{
+    protected $name;
+    protected $callable;
+    protected $options;
+    protected $arguments = array();
+
+    public function __construct($name, $callable, array $options = array())
+    {
+        $this->name = $name;
+        $this->callable = $callable;
+        $this->options = array_merge(array(
+            'needs_environment' => false,
+            'needs_context' => false,
+            'is_variadic' => false,
+            'is_safe' => null,
+            'is_safe_callback' => null,
+            'pre_escape' => null,
+            'preserves_safety' => null,
+            'node_class' => 'Twig_Node_Expression_Filter',
+            'deprecated' => false,
+            'alternative' => null,
+        ), $options);
+    }
+
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    public function getCallable()
+    {
+        return $this->callable;
+    }
+
+    public function getNodeClass()
+    {
+        return $this->options['node_class'];
+    }
+
+    public function setArguments($arguments)
+    {
+        $this->arguments = $arguments;
+    }
+
+    public function getArguments()
+    {
+        return $this->arguments;
+    }
+
+    public function needsEnvironment()
+    {
+        return $this->options['needs_environment'];
+    }
+
+    public function needsContext()
+    {
+        return $this->options['needs_context'];
+    }
+
+    public function getSafe(Twig_Node $filterArgs)
+    {
+        if (null !== $this->options['is_safe']) {
+            return $this->options['is_safe'];
+        }
+
+        if (null !== $this->options['is_safe_callback']) {
+            return call_user_func($this->options['is_safe_callback'], $filterArgs);
+        }
+    }
+
+    public function getPreservesSafety()
+    {
+        return $this->options['preserves_safety'];
+    }
+
+    public function getPreEscape()
+    {
+        return $this->options['pre_escape'];
+    }
+
+    public function isVariadic()
+    {
+        return $this->options['is_variadic'];
+    }
+
+    public function isDeprecated()
+    {
+        return (bool) $this->options['deprecated'];
+    }
+
+    public function getDeprecatedVersion()
+    {
+        return $this->options['deprecated'];
+    }
+
+    public function getAlternative()
+    {
+        return $this->options['alternative'];
+    }
+}
diff --git a/public/system/library/template/Twig/SimpleFunction.php b/public/system/library/template/Twig/SimpleFunction.php
new file mode 100644
index 0000000..63003d6
--- /dev/null
+++ b/public/system/library/template/Twig/SimpleFunction.php
@@ -0,0 +1,107 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010-2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template function.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_SimpleFunction
+{
+    protected $name;
+    protected $callable;
+    protected $options;
+    protected $arguments = array();
+
+    public function __construct($name, $callable, array $options = array())
+    {
+        $this->name = $name;
+        $this->callable = $callable;
+        $this->options = array_merge(array(
+            'needs_environment' => false,
+            'needs_context' => false,
+            'is_variadic' => false,
+            'is_safe' => null,
+            'is_safe_callback' => null,
+            'node_class' => 'Twig_Node_Expression_Function',
+            'deprecated' => false,
+            'alternative' => null,
+        ), $options);
+    }
+
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    public function getCallable()
+    {
+        return $this->callable;
+    }
+
+    public function getNodeClass()
+    {
+        return $this->options['node_class'];
+    }
+
+    public function setArguments($arguments)
+    {
+        $this->arguments = $arguments;
+    }
+
+    public function getArguments()
+    {
+        return $this->arguments;
+    }
+
+    public function needsEnvironment()
+    {
+        return $this->options['needs_environment'];
+    }
+
+    public function needsContext()
+    {
+        return $this->options['needs_context'];
+    }
+
+    public function getSafe(Twig_Node $functionArgs)
+    {
+        if (null !== $this->options['is_safe']) {
+            return $this->options['is_safe'];
+        }
+
+        if (null !== $this->options['is_safe_callback']) {
+            return call_user_func($this->options['is_safe_callback'], $functionArgs);
+        }
+
+        return array();
+    }
+
+    public function isVariadic()
+    {
+        return $this->options['is_variadic'];
+    }
+
+    public function isDeprecated()
+    {
+        return (bool) $this->options['deprecated'];
+    }
+
+    public function getDeprecatedVersion()
+    {
+        return $this->options['deprecated'];
+    }
+
+    public function getAlternative()
+    {
+        return $this->options['alternative'];
+    }
+}
diff --git a/public/system/library/template/Twig/SimpleTest.php b/public/system/library/template/Twig/SimpleTest.php
new file mode 100644
index 0000000..cff3ae7
--- /dev/null
+++ b/public/system/library/template/Twig/SimpleTest.php
@@ -0,0 +1,69 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010-2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_SimpleTest
+{
+    protected $name;
+    protected $callable;
+    protected $options;
+
+    public function __construct($name, $callable, array $options = array())
+    {
+        $this->name = $name;
+        $this->callable = $callable;
+        $this->options = array_merge(array(
+            'is_variadic' => false,
+            'node_class' => 'Twig_Node_Expression_Test',
+            'deprecated' => false,
+            'alternative' => null,
+        ), $options);
+    }
+
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    public function getCallable()
+    {
+        return $this->callable;
+    }
+
+    public function getNodeClass()
+    {
+        return $this->options['node_class'];
+    }
+
+    public function isVariadic()
+    {
+        return $this->options['is_variadic'];
+    }
+
+    public function isDeprecated()
+    {
+        return (bool) $this->options['deprecated'];
+    }
+
+    public function getDeprecatedVersion()
+    {
+        return $this->options['deprecated'];
+    }
+
+    public function getAlternative()
+    {
+        return $this->options['alternative'];
+    }
+}
diff --git a/public/system/library/template/Twig/Template.php b/public/system/library/template/Twig/Template.php
new file mode 100644
index 0000000..7f7f62a
--- /dev/null
+++ b/public/system/library/template/Twig/Template.php
@@ -0,0 +1,620 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Default base class for compiled templates.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class Twig_Template implements Twig_TemplateInterface
+{
+    protected static $cache = array();
+
+    protected $parent;
+    protected $parents = array();
+    protected $env;
+    protected $blocks = array();
+    protected $traits = array();
+
+    /**
+     * Constructor.
+     *
+     * @param Twig_Environment $env A Twig_Environment instance
+     */
+    public function __construct(Twig_Environment $env)
+    {
+        $this->env = $env;
+    }
+
+    /**
+     * Returns the template name.
+     *
+     * @return string The template name
+     */
+    abstract public function getTemplateName();
+
+    /**
+     * @deprecated since 1.20 (to be removed in 2.0)
+     */
+    public function getEnvironment()
+    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since version 1.20 and will be removed in 2.0.', E_USER_DEPRECATED);
+
+        return $this->env;
+    }
+
+    /**
+     * Returns the parent template.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @param array $context
+     *
+     * @return Twig_TemplateInterface|false The parent template or false if there is no parent
+     *
+     * @internal
+     */
+    public function getParent(array $context)
+    {
+        if (null !== $this->parent) {
+            return $this->parent;
+        }
+
+        try {
+            $parent = $this->doGetParent($context);
+
+            if (false === $parent) {
+                return false;
+            }
+
+            if ($parent instanceof self) {
+                return $this->parents[$parent->getTemplateName()] = $parent;
+            }
+
+            if (!isset($this->parents[$parent])) {
+                $this->parents[$parent] = $this->loadTemplate($parent);
+            }
+        } catch (Twig_Error_Loader $e) {
+            $e->setTemplateFile(null);
+            $e->guess();
+
+            throw $e;
+        }
+
+        return $this->parents[$parent];
+    }
+
+    protected function doGetParent(array $context)
+    {
+        return false;
+    }
+
+    public function isTraitable()
+    {
+        return true;
+    }
+
+    /**
+     * Displays a parent block.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @param string $name    The block name to display from the parent
+     * @param array  $context The context
+     * @param array  $blocks  The current set of blocks
+     *
+     * @internal
+     */
+    public function displayParentBlock($name, array $context, array $blocks = array())
+    {
+        $name = (string) $name;
+
+        if (isset($this->traits[$name])) {
+            $this->traits[$name][0]->displayBlock($name, $context, $blocks, false);
+        } elseif (false !== $parent = $this->getParent($context)) {
+            $parent->displayBlock($name, $context, $blocks, false);
+        } else {
+            throw new Twig_Error_Runtime(sprintf('The template has no parent and no traits defining the "%s" block', $name), -1, $this->getTemplateName());
+        }
+    }
+
+    /**
+     * Displays a block.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @param string $name      The block name to display
+     * @param array  $context   The context
+     * @param array  $blocks    The current set of blocks
+     * @param bool   $useBlocks Whether to use the current set of blocks
+     *
+     * @internal
+     */
+    public function displayBlock($name, array $context, array $blocks = array(), $useBlocks = true)
+    {
+        $name = (string) $name;
+
+        if ($useBlocks && isset($blocks[$name])) {
+            $template = $blocks[$name][0];
+            $block = $blocks[$name][1];
+        } elseif (isset($this->blocks[$name])) {
+            $template = $this->blocks[$name][0];
+            $block = $this->blocks[$name][1];
+        } else {
+            $template = null;
+            $block = null;
+        }
+
+        if (null !== $template) {
+            // avoid RCEs when sandbox is enabled
+            if (!$template instanceof self) {
+                throw new LogicException('A block must be a method on a Twig_Template instance.');
+            }
+
+            try {
+                $template->$block($context, $blocks);
+            } catch (Twig_Error $e) {
+                if (!$e->getTemplateFile()) {
+                    $e->setTemplateFile($template->getTemplateName());
+                }
+
+                // this is mostly useful for Twig_Error_Loader exceptions
+                // see Twig_Error_Loader
+                if (false === $e->getTemplateLine()) {
+                    $e->setTemplateLine(-1);
+                    $e->guess();
+                }
+
+                throw $e;
+            } catch (Exception $e) {
+                throw new Twig_Error_Runtime(sprintf('An exception has been thrown during the rendering of a template ("%s").', $e->getMessage()), -1, $template->getTemplateName(), $e);
+            }
+        } elseif (false !== $parent = $this->getParent($context)) {
+            $parent->displayBlock($name, $context, array_merge($this->blocks, $blocks), false);
+        }
+    }
+
+    /**
+     * Renders a parent block.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @param string $name    The block name to render from the parent
+     * @param array  $context The context
+     * @param array  $blocks  The current set of blocks
+     *
+     * @return string The rendered block
+     *
+     * @internal
+     */
+    public function renderParentBlock($name, array $context, array $blocks = array())
+    {
+        ob_start();
+        $this->displayParentBlock($name, $context, $blocks);
+
+        return ob_get_clean();
+    }
+
+    /**
+     * Renders a block.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @param string $name      The block name to render
+     * @param array  $context   The context
+     * @param array  $blocks    The current set of blocks
+     * @param bool   $useBlocks Whether to use the current set of blocks
+     *
+     * @return string The rendered block
+     *
+     * @internal
+     */
+    public function renderBlock($name, array $context, array $blocks = array(), $useBlocks = true)
+    {
+        ob_start();
+        $this->displayBlock($name, $context, $blocks, $useBlocks);
+
+        return ob_get_clean();
+    }
+
+    /**
+     * Returns whether a block exists or not.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * This method does only return blocks defined in the current template
+     * or defined in "used" traits.
+     *
+     * It does not return blocks from parent templates as the parent
+     * template name can be dynamic, which is only known based on the
+     * current context.
+     *
+     * @param string $name The block name
+     *
+     * @return bool true if the block exists, false otherwise
+     *
+     * @internal
+     */
+    public function hasBlock($name)
+    {
+        return isset($this->blocks[(string) $name]);
+    }
+
+    /**
+     * Returns all block names.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @return array An array of block names
+     *
+     * @see hasBlock
+     *
+     * @internal
+     */
+    public function getBlockNames()
+    {
+        return array_keys($this->blocks);
+    }
+
+    protected function loadTemplate($template, $templateName = null, $line = null, $index = null)
+    {
+        try {
+            if (is_array($template)) {
+                return $this->env->resolveTemplate($template);
+            }
+
+            if ($template instanceof self) {
+                return $template;
+            }
+
+            return $this->env->loadTemplate($template, $index);
+        } catch (Twig_Error $e) {
+            if (!$e->getTemplateFile()) {
+                $e->setTemplateFile($templateName ? $templateName : $this->getTemplateName());
+            }
+
+            if ($e->getTemplateLine()) {
+                throw $e;
+            }
+
+            if (!$line) {
+                $e->guess();
+            } else {
+                $e->setTemplateLine($line);
+            }
+
+            throw $e;
+        }
+    }
+
+    /**
+     * Returns all blocks.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * @return array An array of blocks
+     *
+     * @see hasBlock
+     *
+     * @internal
+     */
+    public function getBlocks()
+    {
+        return $this->blocks;
+    }
+
+    /**
+     * Returns the template source code.
+     *
+     * @return string|null The template source code or null if it is not available
+     */
+    public function getSource()
+    {
+        $reflector = new ReflectionClass($this);
+        $file = $reflector->getFileName();
+
+        if (!file_exists($file)) {
+            return;
+        }
+
+        $source = file($file, FILE_IGNORE_NEW_LINES);
+        array_splice($source, 0, $reflector->getEndLine());
+
+        $i = 0;
+        while (isset($source[$i]) && '/* */' === substr_replace($source[$i], '', 3, -2)) {
+            $source[$i] = str_replace('*//* ', '*/', substr($source[$i], 3, -2));
+            ++$i;
+        }
+        array_splice($source, $i);
+
+        return implode("\n", $source);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function display(array $context, array $blocks = array())
+    {
+        $this->displayWithErrorHandling($this->env->mergeGlobals($context), array_merge($this->blocks, $blocks));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function render(array $context)
+    {
+        $level = ob_get_level();
+        ob_start();
+        try {
+            $this->display($context);
+        } catch (Exception $e) {
+            while (ob_get_level() > $level) {
+                ob_end_clean();
+            }
+
+            throw $e;
+        } catch (Throwable $e) {
+            while (ob_get_level() > $level) {
+                ob_end_clean();
+            }
+
+            throw $e;
+        }
+
+        return ob_get_clean();
+    }
+
+    protected function displayWithErrorHandling(array $context, array $blocks = array())
+    {
+        try {
+            $this->doDisplay($context, $blocks);
+        } catch (Twig_Error $e) {
+            if (!$e->getTemplateFile()) {
+                $e->setTemplateFile($this->getTemplateName());
+            }
+
+            // this is mostly useful for Twig_Error_Loader exceptions
+            // see Twig_Error_Loader
+            if (false === $e->getTemplateLine()) {
+                $e->setTemplateLine(-1);
+                $e->guess();
+            }
+
+            throw $e;
+        } catch (Exception $e) {
+            throw new Twig_Error_Runtime(sprintf('An exception has been thrown during the rendering of a template ("%s").', $e->getMessage()), -1, $this->getTemplateName(), $e);
+        }
+    }
+
+    /**
+     * Auto-generated method to display the template with the given context.
+     *
+     * @param array $context An array of parameters to pass to the template
+     * @param array $blocks  An array of blocks to pass to the template
+     */
+    abstract protected function doDisplay(array $context, array $blocks = array());
+
+    /**
+     * Returns a variable from the context.
+     *
+     * This method is for internal use only and should never be called
+     * directly.
+     *
+     * This method should not be overridden in a sub-class as this is an
+     * implementation detail that has been introduced to optimize variable
+     * access for versions of PHP before 5.4. This is not a way to override
+     * the way to get a variable value.
+     *
+     * @param array  $context           The context
+     * @param string $item              The variable to return from the context
+     * @param bool   $ignoreStrictCheck Whether to ignore the strict variable check or not
+     *
+     * @return mixed The content of the context variable
+     *
+     * @throws Twig_Error_Runtime if the variable does not exist and Twig is running in strict mode
+     *
+     * @internal
+     */
+    final protected function getContext($context, $item, $ignoreStrictCheck = false)
+    {
+        if (!array_key_exists($item, $context)) {
+            if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
+                return;
+            }
+
+            throw new Twig_Error_Runtime(sprintf('Variable "%s" does not exist', $item), -1, $this->getTemplateName());
+        }
+
+        return $context[$item];
+    }
+
+    /**
+     * Returns the attribute value for a given array/object.
+     *
+     * @param mixed  $object            The object or array from where to get the item
+     * @param mixed  $item              The item to get from the array or object
+     * @param array  $arguments         An array of arguments to pass if the item is an object method
+     * @param string $type              The type of attribute (@see Twig_Template constants)
+     * @param bool   $isDefinedTest     Whether this is only a defined check
+     * @param bool   $ignoreStrictCheck Whether to ignore the strict attribute check or not
+     *
+     * @return mixed The attribute value, or a Boolean when $isDefinedTest is true, or null when the attribute is not set and $ignoreStrictCheck is true
+     *
+     * @throws Twig_Error_Runtime if the attribute does not exist and Twig is running in strict mode and $isDefinedTest is false
+     */
+    protected function getAttribute($object, $item, array $arguments = array(), $type = self::ANY_CALL, $isDefinedTest = false, $ignoreStrictCheck = false)
+    {
+        // array
+        if (self::METHOD_CALL !== $type) {
+            $arrayItem = is_bool($item) || is_float($item) ? (int) $item : $item;
+
+            if ((is_array($object) && array_key_exists($arrayItem, $object))
+                || ($object instanceof ArrayAccess && isset($object[$arrayItem]))
+            ) {
+                if ($isDefinedTest) {
+                    return true;
+                }
+
+                return $object[$arrayItem];
+            }
+
+            if (self::ARRAY_CALL === $type || !is_object($object)) {
+                if ($isDefinedTest) {
+                    return false;
+                }
+
+                if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
+                    return;
+                }
+
+                if ($object instanceof ArrayAccess) {
+                    $message = sprintf('Key "%s" in object with ArrayAccess of class "%s" does not exist', $arrayItem, get_class($object));
+                } elseif (is_object($object)) {
+                    $message = sprintf('Impossible to access a key "%s" on an object of class "%s" that does not implement ArrayAccess interface', $item, get_class($object));
+                } elseif (is_array($object)) {
+                    if (empty($object)) {
+                        $message = sprintf('Key "%s" does not exist as the array is empty', $arrayItem);
+                    } else {
+                        $message = sprintf('Key "%s" for array with keys "%s" does not exist', $arrayItem, implode(', ', array_keys($object)));
+                    }
+                } elseif (self::ARRAY_CALL === $type) {
+                    if (null === $object) {
+                        $message = sprintf('Impossible to access a key ("%s") on a null variable', $item);
+                    } else {
+                        $message = sprintf('Impossible to access a key ("%s") on a %s variable ("%s")', $item, gettype($object), $object);
+                    }
+                } elseif (null === $object) {
+                    $message = sprintf('Impossible to access an attribute ("%s") on a null variable', $item);
+                } else {
+                    $message = sprintf('Impossible to access an attribute ("%s") on a %s variable ("%s")', $item, gettype($object), $object);
+                }
+
+                throw new Twig_Error_Runtime($message, -1, $this->getTemplateName());
+            }
+        }
+
+        if (!is_object($object)) {
+            if ($isDefinedTest) {
+                return false;
+            }
+
+            if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
+                return;
+            }
+
+            if (null === $object) {
+                $message = sprintf('Impossible to invoke a method ("%s") on a null variable', $item);
+            } else {
+                $message = sprintf('Impossible to invoke a method ("%s") on a %s variable ("%s")', $item, gettype($object), $object);
+            }
+
+            throw new Twig_Error_Runtime($message, -1, $this->getTemplateName());
+        }
+
+        // object property
+        if (self::METHOD_CALL !== $type && !$object instanceof self) { // Twig_Template does not have public properties, and we don't want to allow access to internal ones
+            if (isset($object->$item) || array_key_exists((string) $item, $object)) {
+                if ($isDefinedTest) {
+                    return true;
+                }
+
+                if ($this->env->hasExtension('sandbox')) {
+                    $this->env->getExtension('sandbox')->checkPropertyAllowed($object, $item);
+                }
+
+                return $object->$item;
+            }
+        }
+
+        $class = get_class($object);
+
+        // object method
+        if (!isset(self::$cache[$class]['methods'])) {
+            // get_class_methods returns all methods accessible in the scope, but we only want public ones to be accessible in templates
+            if ($object instanceof self) {
+                $ref = new ReflectionClass($class);
+                $methods = array();
+
+                foreach ($ref->getMethods(ReflectionMethod::IS_PUBLIC) as $refMethod) {
+                    $methodName = strtolower($refMethod->name);
+
+                    // Accessing the environment from templates is forbidden to prevent untrusted changes to the environment
+                    if ('getenvironment' !== $methodName) {
+                        $methods[$methodName] = true;
+                    }
+                }
+
+                self::$cache[$class]['methods'] = $methods;
+            } else {
+                self::$cache[$class]['methods'] = array_change_key_case(array_flip(get_class_methods($object)));
+            }
+        }
+
+        $call = false;
+        $lcItem = strtolower($item);
+        if (isset(self::$cache[$class]['methods'][$lcItem])) {
+            $method = (string) $item;
+        } elseif (isset(self::$cache[$class]['methods']['get'.$lcItem])) {
+            $method = 'get'.$item;
+        } elseif (isset(self::$cache[$class]['methods']['is'.$lcItem])) {
+            $method = 'is'.$item;
+        } elseif (isset(self::$cache[$class]['methods']['__call'])) {
+            $method = (string) $item;
+            $call = true;
+        } else {
+            if ($isDefinedTest) {
+                return false;
+            }
+
+            if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
+                return;
+            }
+
+            throw new Twig_Error_Runtime(sprintf('Neither the property "%1$s" nor one of the methods "%1$s()", "get%1$s()"/"is%1$s()" or "__call()" exist and have public access in class "%2$s"', $item, get_class($object)), -1, $this->getTemplateName());
+        }
+
+        if ($isDefinedTest) {
+            return true;
+        }
+
+        if ($this->env->hasExtension('sandbox')) {
+            $this->env->getExtension('sandbox')->checkMethodAllowed($object, $method);
+        }
+
+        // Some objects throw exceptions when they have __call, and the method we try
+        // to call is not supported. If ignoreStrictCheck is true, we should return null.
+        try {
+            $ret = call_user_func_array(array($object, $method), $arguments);
+        } catch (BadMethodCallException $e) {
+            if ($call && ($ignoreStrictCheck || !$this->env->isStrictVariables())) {
+                return;
+            }
+            throw $e;
+        }
+
+        // useful when calling a template method from a template
+        // this is not supported but unfortunately heavily used in the Symfony profiler
+        if ($object instanceof Twig_TemplateInterface) {
+            return $ret === '' ? '' : new Twig_Markup($ret, $this->env->getCharset());
+        }
+
+        return $ret;
+    }
+}
diff --git a/public/system/library/template/Twig/TemplateInterface.php b/public/system/library/template/Twig/TemplateInterface.php
new file mode 100644
index 0000000..3274640
--- /dev/null
+++ b/public/system/library/template/Twig/TemplateInterface.php
@@ -0,0 +1,48 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by all compiled templates.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 3.0)
+ */
+interface Twig_TemplateInterface
+{
+    const ANY_CALL = 'any';
+    const ARRAY_CALL = 'array';
+    const METHOD_CALL = 'method';
+
+    /**
+     * Renders the template with the given context and returns it as string.
+     *
+     * @param array $context An array of parameters to pass to the template
+     *
+     * @return string The rendered template
+     */
+    public function render(array $context);
+
+    /**
+     * Displays the template with the given context.
+     *
+     * @param array $context An array of parameters to pass to the template
+     * @param array $blocks  An array of blocks to pass to the template
+     */
+    public function display(array $context, array $blocks = array());
+
+    /**
+     * Returns the bound environment for this template.
+     *
+     * @return Twig_Environment The current environment
+     */
+    public function getEnvironment();
+}
diff --git a/public/system/library/template/Twig/Test.php b/public/system/library/template/Twig/Test.php
new file mode 100644
index 0000000..3c2d859
--- /dev/null
+++ b/public/system/library/template/Twig/Test.php
@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Test class is deprecated since version 1.12 and will be removed in 2.0. Use Twig_SimpleTest instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+abstract class Twig_Test implements Twig_TestInterface, Twig_TestCallableInterface
+{
+    protected $options;
+    protected $arguments = array();
+
+    public function __construct(array $options = array())
+    {
+        $this->options = array_merge(array(
+            'callable' => null,
+        ), $options);
+    }
+
+    public function getCallable()
+    {
+        return $this->options['callable'];
+    }
+}
diff --git a/public/system/library/template/Twig/Test/Function.php b/public/system/library/template/Twig/Test/Function.php
new file mode 100644
index 0000000..5e76c71
--- /dev/null
+++ b/public/system/library/template/Twig/Test/Function.php
@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Test_Function class is deprecated since version 1.12 and will be removed in 2.0. Use Twig_SimpleTest instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a function template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Test_Function extends Twig_Test
+{
+    protected $function;
+
+    public function __construct($function, array $options = array())
+    {
+        $options['callable'] = $function;
+
+        parent::__construct($options);
+
+        $this->function = $function;
+    }
+
+    public function compile()
+    {
+        return $this->function;
+    }
+}
diff --git a/public/system/library/template/Twig/Test/IntegrationTestCase.php b/public/system/library/template/Twig/Test/IntegrationTestCase.php
new file mode 100644
index 0000000..45ca7dc
--- /dev/null
+++ b/public/system/library/template/Twig/Test/IntegrationTestCase.php
@@ -0,0 +1,232 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Integration test helper.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Karma Dordrak <drak@zikula.org>
+ */
+abstract class Twig_Test_IntegrationTestCase extends PHPUnit_Framework_TestCase
+{
+    /**
+     * @return string
+     */
+    abstract protected function getFixturesDir();
+
+    /**
+     * @return Twig_ExtensionInterface[]
+     */
+    protected function getExtensions()
+    {
+        return array();
+    }
+
+    /**
+     * @return Twig_SimpleFilter[]
+     */
+    protected function getTwigFilters()
+    {
+        return array();
+    }
+
+    /**
+     * @return Twig_SimpleFunction[]
+     */
+    protected function getTwigFunctions()
+    {
+        return array();
+    }
+
+    /**
+     * @return Twig_SimpleTest[]
+     */
+    protected function getTwigTests()
+    {
+        return array();
+    }
+
+    /**
+     * @dataProvider getTests
+     */
+    public function testIntegration($file, $message, $condition, $templates, $exception, $outputs)
+    {
+        $this->doIntegrationTest($file, $message, $condition, $templates, $exception, $outputs);
+    }
+
+    /**
+     * @dataProvider getLegacyTests
+     * @group legacy
+     */
+    public function testLegacyIntegration($file, $message, $condition, $templates, $exception, $outputs)
+    {
+        $this->doIntegrationTest($file, $message, $condition, $templates, $exception, $outputs);
+    }
+
+    public function getTests($name, $legacyTests = false)
+    {
+        $fixturesDir = realpath($this->getFixturesDir());
+        $tests = array();
+
+        foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator($fixturesDir), RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
+            if (!preg_match('/\.test$/', $file)) {
+                continue;
+            }
+
+            if ($legacyTests xor false !== strpos($file->getRealpath(), '.legacy.test')) {
+                continue;
+            }
+
+            $test = file_get_contents($file->getRealpath());
+
+            if (preg_match('/--TEST--\s*(.*?)\s*(?:--CONDITION--\s*(.*))?\s*((?:--TEMPLATE(?:\(.*?\))?--(?:.*?))+)\s*(?:--DATA--\s*(.*))?\s*--EXCEPTION--\s*(.*)/sx', $test, $match)) {
+                $message = $match[1];
+                $condition = $match[2];
+                $templates = self::parseTemplates($match[3]);
+                $exception = $match[5];
+                $outputs = array(array(null, $match[4], null, ''));
+            } elseif (preg_match('/--TEST--\s*(.*?)\s*(?:--CONDITION--\s*(.*))?\s*((?:--TEMPLATE(?:\(.*?\))?--(?:.*?))+)--DATA--.*?--EXPECT--.*/s', $test, $match)) {
+                $message = $match[1];
+                $condition = $match[2];
+                $templates = self::parseTemplates($match[3]);
+                $exception = false;
+                preg_match_all('/--DATA--(.*?)(?:--CONFIG--(.*?))?--EXPECT--(.*?)(?=\-\-DATA\-\-|$)/s', $test, $outputs, PREG_SET_ORDER);
+            } else {
+                throw new InvalidArgumentException(sprintf('Test "%s" is not valid.', str_replace($fixturesDir.'/', '', $file)));
+            }
+
+            $tests[] = array(str_replace($fixturesDir.'/', '', $file), $message, $condition, $templates, $exception, $outputs);
+        }
+
+        if ($legacyTests && empty($tests)) {
+            // add a dummy test to avoid a PHPUnit message
+            return array(array('not', '-', '', array(), '', array()));
+        }
+
+        return $tests;
+    }
+
+    public function getLegacyTests()
+    {
+        return $this->getTests('testLegacyIntegration', true);
+    }
+
+    protected function doIntegrationTest($file, $message, $condition, $templates, $exception, $outputs)
+    {
+        if ($condition) {
+            eval('$ret = '.$condition.';');
+            if (!$ret) {
+                $this->markTestSkipped($condition);
+            }
+        }
+
+        $loader = new Twig_Loader_Array($templates);
+
+        foreach ($outputs as $i => $match) {
+            $config = array_merge(array(
+                'cache' => false,
+                'strict_variables' => true,
+            ), $match[2] ? eval($match[2].';') : array());
+            $twig = new Twig_Environment($loader, $config);
+            $twig->addGlobal('global', 'global');
+            foreach ($this->getExtensions() as $extension) {
+                $twig->addExtension($extension);
+            }
+
+            foreach ($this->getTwigFilters() as $filter) {
+                $twig->addFilter($filter);
+            }
+
+            foreach ($this->getTwigTests() as $test) {
+                $twig->addTest($test);
+            }
+
+            foreach ($this->getTwigFunctions() as $function) {
+                $twig->addFunction($function);
+            }
+
+            // avoid using the same PHP class name for different cases
+            // only for PHP 5.2+
+            if (PHP_VERSION_ID >= 50300) {
+                $p = new ReflectionProperty($twig, 'templateClassPrefix');
+                $p->setAccessible(true);
+                $p->setValue($twig, '__TwigTemplate_'.hash('sha256', uniqid(mt_rand(), true), false).'_');
+            }
+
+            try {
+                $template = $twig->loadTemplate('index.twig');
+            } catch (Exception $e) {
+                if (false !== $exception) {
+                    $message = $e->getMessage();
+                    $this->assertSame(trim($exception), trim(sprintf('%s: %s', get_class($e), $message)));
+                    $this->assertSame('.', substr($message, strlen($message) - 1), $message, 'Exception message must end with a dot.');
+
+                    return;
+                }
+
+                if ($e instanceof Twig_Error_Syntax) {
+                    $e->setTemplateFile($file);
+
+                    throw $e;
+                }
+
+                throw new Twig_Error(sprintf('%s: %s', get_class($e), $e->getMessage()), -1, $file, $e);
+            }
+
+            try {
+                $output = trim($template->render(eval($match[1].';')), "\n ");
+            } catch (Exception $e) {
+                if (false !== $exception) {
+                    $this->assertSame(trim($exception), trim(sprintf('%s: %s', get_class($e), $e->getMessage())));
+
+                    return;
+                }
+
+                if ($e instanceof Twig_Error_Syntax) {
+                    $e->setTemplateFile($file);
+                } else {
+                    $e = new Twig_Error(sprintf('%s: %s', get_class($e), $e->getMessage()), -1, $file, $e);
+                }
+
+                $output = trim(sprintf('%s: %s', get_class($e), $e->getMessage()));
+            }
+
+            if (false !== $exception) {
+                list($class) = explode(':', $exception);
+                $this->assertThat(null, new PHPUnit_Framework_Constraint_Exception($class));
+            }
+
+            $expected = trim($match[3], "\n ");
+
+            if ($expected !== $output) {
+                printf("Compiled templates that failed on case %d:\n", $i + 1);
+
+                foreach (array_keys($templates) as $name) {
+                    echo "Template: $name\n";
+                    $source = $loader->getSource($name);
+                    echo $twig->compile($twig->parse($twig->tokenize($source, $name)));
+                }
+            }
+            $this->assertEquals($expected, $output, $message.' (in '.$file.')');
+        }
+    }
+
+    protected static function parseTemplates($test)
+    {
+        $templates = array();
+        preg_match_all('/--TEMPLATE(?:\((.*?)\))?--(.*?)(?=\-\-TEMPLATE|$)/s', $test, $matches, PREG_SET_ORDER);
+        foreach ($matches as $match) {
+            $templates[($match[1] ? $match[1] : 'index.twig')] = $match[2];
+        }
+
+        return $templates;
+    }
+}
diff --git a/public/system/library/template/Twig/Test/Method.php b/public/system/library/template/Twig/Test/Method.php
new file mode 100644
index 0000000..2779986
--- /dev/null
+++ b/public/system/library/template/Twig/Test/Method.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Test_Method class is deprecated since version 1.12 and will be removed in 2.0. Use Twig_SimpleTest instead.', E_USER_DEPRECATED);
+
+/**
+ * Represents a method template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Test_Method extends Twig_Test
+{
+    protected $extension;
+    protected $method;
+
+    public function __construct(Twig_ExtensionInterface $extension, $method, array $options = array())
+    {
+        $options['callable'] = array($extension, $method);
+
+        parent::__construct($options);
+
+        $this->extension = $extension;
+        $this->method = $method;
+    }
+
+    public function compile()
+    {
+        return sprintf('$this->env->getExtension(\'%s\')->%s', $this->extension->getName(), $this->method);
+    }
+}
diff --git a/public/system/library/template/Twig/Test/Node.php b/public/system/library/template/Twig/Test/Node.php
new file mode 100644
index 0000000..baef49c
--- /dev/null
+++ b/public/system/library/template/Twig/Test/Node.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+@trigger_error('The Twig_Test_Node class is deprecated since version 1.12 and will be removed in 2.0.', E_USER_DEPRECATED);
+
+/**
+ * Represents a template test as a Node.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_Test_Node extends Twig_Test
+{
+    protected $class;
+
+    public function __construct($class, array $options = array())
+    {
+        parent::__construct($options);
+
+        $this->class = $class;
+    }
+
+    public function getClass()
+    {
+        return $this->class;
+    }
+
+    public function compile()
+    {
+    }
+}
diff --git a/public/system/library/template/Twig/Test/NodeTestCase.php b/public/system/library/template/Twig/Test/NodeTestCase.php
new file mode 100644
index 0000000..e591c1d
--- /dev/null
+++ b/public/system/library/template/Twig/Test/NodeTestCase.php
@@ -0,0 +1,64 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+abstract class Twig_Test_NodeTestCase extends PHPUnit_Framework_TestCase
+{
+    abstract public function getTests();
+
+    /**
+     * @dataProvider getTests
+     */
+    public function testCompile($node, $source, $environment = null, $isPattern = false)
+    {
+        $this->assertNodeCompilation($source, $node, $environment, $isPattern);
+    }
+
+    public function assertNodeCompilation($source, Twig_Node $node, Twig_Environment $environment = null, $isPattern = false)
+    {
+        $compiler = $this->getCompiler($environment);
+        $compiler->compile($node);
+
+        if ($isPattern) {
+            $this->assertStringMatchesFormat($source, trim($compiler->getSource()));
+        } else {
+            $this->assertEquals($source, trim($compiler->getSource()));
+        }
+    }
+
+    protected function getCompiler(Twig_Environment $environment = null)
+    {
+        return new Twig_Compiler(null === $environment ? $this->getEnvironment() : $environment);
+    }
+
+    protected function getEnvironment()
+    {
+        return new Twig_Environment(new Twig_Loader_Array(array()));
+    }
+
+    protected function getVariableGetter($name, $line = false)
+    {
+        $line = $line > 0 ? "// line {$line}\n" : '';
+
+        if (PHP_VERSION_ID >= 50400) {
+            return sprintf('%s(isset($context["%s"]) ? $context["%s"] : null)', $line, $name, $name);
+        }
+
+        return sprintf('%s$this->getContext($context, "%s")', $line, $name);
+    }
+
+    protected function getAttributeGetter()
+    {
+        if (function_exists('twig_template_get_attributes')) {
+            return 'twig_template_get_attributes($this, ';
+        }
+
+        return '$this->getAttribute(';
+    }
+}
diff --git a/public/system/library/template/Twig/TestCallableInterface.php b/public/system/library/template/Twig/TestCallableInterface.php
new file mode 100644
index 0000000..98d3457
--- /dev/null
+++ b/public/system/library/template/Twig/TestCallableInterface.php
@@ -0,0 +1,22 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a callable template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_TestCallableInterface
+{
+    public function getCallable();
+}
diff --git a/public/system/library/template/Twig/TestInterface.php b/public/system/library/template/Twig/TestInterface.php
new file mode 100644
index 0000000..2fa821c
--- /dev/null
+++ b/public/system/library/template/Twig/TestInterface.php
@@ -0,0 +1,27 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a template test.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_TestInterface
+{
+    /**
+     * Compiles a test.
+     *
+     * @return string The PHP code for the test
+     */
+    public function compile();
+}
diff --git a/public/system/library/template/Twig/Token.php b/public/system/library/template/Twig/Token.php
new file mode 100644
index 0000000..a0a029b
--- /dev/null
+++ b/public/system/library/template/Twig/Token.php
@@ -0,0 +1,216 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a Token.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Token
+{
+    protected $value;
+    protected $type;
+    protected $lineno;
+
+    const EOF_TYPE = -1;
+    const TEXT_TYPE = 0;
+    const BLOCK_START_TYPE = 1;
+    const VAR_START_TYPE = 2;
+    const BLOCK_END_TYPE = 3;
+    const VAR_END_TYPE = 4;
+    const NAME_TYPE = 5;
+    const NUMBER_TYPE = 6;
+    const STRING_TYPE = 7;
+    const OPERATOR_TYPE = 8;
+    const PUNCTUATION_TYPE = 9;
+    const INTERPOLATION_START_TYPE = 10;
+    const INTERPOLATION_END_TYPE = 11;
+
+    /**
+     * Constructor.
+     *
+     * @param int    $type   The type of the token
+     * @param string $value  The token value
+     * @param int    $lineno The line position in the source
+     */
+    public function __construct($type, $value, $lineno)
+    {
+        $this->type = $type;
+        $this->value = $value;
+        $this->lineno = $lineno;
+    }
+
+    /**
+     * Returns a string representation of the token.
+     *
+     * @return string A string representation of the token
+     */
+    public function __toString()
+    {
+        return sprintf('%s(%s)', self::typeToString($this->type, true), $this->value);
+    }
+
+    /**
+     * Tests the current token for a type and/or a value.
+     *
+     * Parameters may be:
+     * * just type
+     * * type and value (or array of possible values)
+     * * just value (or array of possible values) (NAME_TYPE is used as type)
+     *
+     * @param array|int         $type   The type to test
+     * @param array|string|null $values The token value
+     *
+     * @return bool
+     */
+    public function test($type, $values = null)
+    {
+        if (null === $values && !is_int($type)) {
+            $values = $type;
+            $type = self::NAME_TYPE;
+        }
+
+        return ($this->type === $type) && (
+            null === $values ||
+            (is_array($values) && in_array($this->value, $values)) ||
+            $this->value == $values
+        );
+    }
+
+    /**
+     * Gets the line.
+     *
+     * @return int The source line
+     */
+    public function getLine()
+    {
+        return $this->lineno;
+    }
+
+    /**
+     * Gets the token type.
+     *
+     * @return int The token type
+     */
+    public function getType()
+    {
+        return $this->type;
+    }
+
+    /**
+     * Gets the token value.
+     *
+     * @return string The token value
+     */
+    public function getValue()
+    {
+        return $this->value;
+    }
+
+    /**
+     * Returns the constant representation (internal) of a given type.
+     *
+     * @param int  $type  The type as an integer
+     * @param bool $short Whether to return a short representation or not
+     *
+     * @return string The string representation
+     */
+    public static function typeToString($type, $short = false)
+    {
+        switch ($type) {
+            case self::EOF_TYPE:
+                $name = 'EOF_TYPE';
+                break;
+            case self::TEXT_TYPE:
+                $name = 'TEXT_TYPE';
+                break;
+            case self::BLOCK_START_TYPE:
+                $name = 'BLOCK_START_TYPE';
+                break;
+            case self::VAR_START_TYPE:
+                $name = 'VAR_START_TYPE';
+                break;
+            case self::BLOCK_END_TYPE:
+                $name = 'BLOCK_END_TYPE';
+                break;
+            case self::VAR_END_TYPE:
+                $name = 'VAR_END_TYPE';
+                break;
+            case self::NAME_TYPE:
+                $name = 'NAME_TYPE';
+                break;
+            case self::NUMBER_TYPE:
+                $name = 'NUMBER_TYPE';
+                break;
+            case self::STRING_TYPE:
+                $name = 'STRING_TYPE';
+                break;
+            case self::OPERATOR_TYPE:
+                $name = 'OPERATOR_TYPE';
+                break;
+            case self::PUNCTUATION_TYPE:
+                $name = 'PUNCTUATION_TYPE';
+                break;
+            case self::INTERPOLATION_START_TYPE:
+                $name = 'INTERPOLATION_START_TYPE';
+                break;
+            case self::INTERPOLATION_END_TYPE:
+                $name = 'INTERPOLATION_END_TYPE';
+                break;
+            default:
+                throw new LogicException(sprintf('Token of type "%s" does not exist.', $type));
+        }
+
+        return $short ? $name : 'Twig_Token::'.$name;
+    }
+
+    /**
+     * Returns the english representation of a given type.
+     *
+     * @param int $type The type as an integer
+     *
+     * @return string The string representation
+     */
+    public static function typeToEnglish($type)
+    {
+        switch ($type) {
+            case self::EOF_TYPE:
+                return 'end of template';
+            case self::TEXT_TYPE:
+                return 'text';
+            case self::BLOCK_START_TYPE:
+                return 'begin of statement block';
+            case self::VAR_START_TYPE:
+                return 'begin of print statement';
+            case self::BLOCK_END_TYPE:
+                return 'end of statement block';
+            case self::VAR_END_TYPE:
+                return 'end of print statement';
+            case self::NAME_TYPE:
+                return 'name';
+            case self::NUMBER_TYPE:
+                return 'number';
+            case self::STRING_TYPE:
+                return 'string';
+            case self::OPERATOR_TYPE:
+                return 'operator';
+            case self::PUNCTUATION_TYPE:
+                return 'punctuation';
+            case self::INTERPOLATION_START_TYPE:
+                return 'begin of string interpolation';
+            case self::INTERPOLATION_END_TYPE:
+                return 'end of string interpolation';
+            default:
+                throw new LogicException(sprintf('Token of type "%s" does not exist.', $type));
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser.php b/public/system/library/template/Twig/TokenParser.php
new file mode 100644
index 0000000..fa9b6d8
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Base class for all token parsers.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+abstract class Twig_TokenParser implements Twig_TokenParserInterface
+{
+    /**
+     * @var Twig_Parser
+     */
+    protected $parser;
+
+    /**
+     * Sets the parser associated with this token parser.
+     *
+     * @param Twig_Parser $parser A Twig_Parser instance
+     */
+    public function setParser(Twig_Parser $parser)
+    {
+        $this->parser = $parser;
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/AutoEscape.php b/public/system/library/template/Twig/TokenParser/AutoEscape.php
new file mode 100644
index 0000000..fd34caf
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/AutoEscape.php
@@ -0,0 +1,79 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Marks a section of a template to be escaped or not.
+ *
+ * <pre>
+ * {% autoescape true %}
+ *   Everything will be automatically escaped in this block
+ * {% endautoescape %}
+ *
+ * {% autoescape false %}
+ *   Everything will be outputed as is in this block
+ * {% endautoescape %}
+ *
+ * {% autoescape true js %}
+ *   Everything will be automatically escaped in this block
+ *   using the js escaping strategy
+ * {% endautoescape %}
+ * </pre>
+ */
+class Twig_TokenParser_AutoEscape extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $stream = $this->parser->getStream();
+
+        if ($stream->test(Twig_Token::BLOCK_END_TYPE)) {
+            $value = 'html';
+        } else {
+            $expr = $this->parser->getExpressionParser()->parseExpression();
+            if (!$expr instanceof Twig_Node_Expression_Constant) {
+                throw new Twig_Error_Syntax('An escaping strategy must be a string or a bool.', $stream->getCurrent()->getLine(), $stream->getFilename());
+            }
+            $value = $expr->getAttribute('value');
+
+            $compat = true === $value || false === $value;
+
+            if (true === $value) {
+                $value = 'html';
+            }
+
+            if ($compat && $stream->test(Twig_Token::NAME_TYPE)) {
+                @trigger_error('Using the autoescape tag with "true" or "false" before the strategy name is deprecated since version 1.21.', E_USER_DEPRECATED);
+
+                if (false === $value) {
+                    throw new Twig_Error_Syntax('Unexpected escaping strategy as you set autoescaping to false.', $stream->getCurrent()->getLine(), $stream->getFilename());
+                }
+
+                $value = $stream->next()->getValue();
+            }
+        }
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+        $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_AutoEscape($value, $body, $lineno, $this->getTag());
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endautoescape');
+    }
+
+    public function getTag()
+    {
+        return 'autoescape';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Block.php b/public/system/library/template/Twig/TokenParser/Block.php
new file mode 100644
index 0000000..4ffafbe
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Block.php
@@ -0,0 +1,69 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Marks a section of a template as being reusable.
+ *
+ * <pre>
+ *  {% block head %}
+ *    <link rel="stylesheet" href="style.css" />
+ *    <title>{% block title %}{% endblock %} - My Webpage</title>
+ *  {% endblock %}
+ * </pre>
+ */
+class Twig_TokenParser_Block extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $stream = $this->parser->getStream();
+        $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+        if ($this->parser->hasBlock($name)) {
+            throw new Twig_Error_Syntax(sprintf("The block '%s' has already been defined line %d.", $name, $this->parser->getBlock($name)->getLine()), $stream->getCurrent()->getLine(), $stream->getFilename());
+        }
+        $this->parser->setBlock($name, $block = new Twig_Node_Block($name, new Twig_Node(array()), $lineno));
+        $this->parser->pushLocalScope();
+        $this->parser->pushBlockStack($name);
+
+        if ($stream->nextIf(Twig_Token::BLOCK_END_TYPE)) {
+            $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+            if ($token = $stream->nextIf(Twig_Token::NAME_TYPE)) {
+                $value = $token->getValue();
+
+                if ($value != $name) {
+                    throw new Twig_Error_Syntax(sprintf('Expected endblock for block "%s" (but "%s" given).', $name, $value), $stream->getCurrent()->getLine(), $stream->getFilename());
+                }
+            }
+        } else {
+            $body = new Twig_Node(array(
+                new Twig_Node_Print($this->parser->getExpressionParser()->parseExpression(), $lineno),
+            ));
+        }
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $block->setNode('body', $body);
+        $this->parser->popBlockStack();
+        $this->parser->popLocalScope();
+
+        return new Twig_Node_BlockReference($name, $lineno, $this->getTag());
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endblock');
+    }
+
+    public function getTag()
+    {
+        return 'block';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Do.php b/public/system/library/template/Twig/TokenParser/Do.php
new file mode 100644
index 0000000..7adb5a0
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Do.php
@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Evaluates an expression, discarding the returned value.
+ */
+class Twig_TokenParser_Do extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $expr = $this->parser->getExpressionParser()->parseExpression();
+
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_Do($expr, $token->getLine(), $this->getTag());
+    }
+
+    public function getTag()
+    {
+        return 'do';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Embed.php b/public/system/library/template/Twig/TokenParser/Embed.php
new file mode 100644
index 0000000..e685b95
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Embed.php
@@ -0,0 +1,54 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2012 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Embeds a template.
+ */
+class Twig_TokenParser_Embed extends Twig_TokenParser_Include
+{
+    public function parse(Twig_Token $token)
+    {
+        $stream = $this->parser->getStream();
+
+        $parent = $this->parser->getExpressionParser()->parseExpression();
+
+        list($variables, $only, $ignoreMissing) = $this->parseArguments();
+
+        // inject a fake parent to make the parent() function work
+        $stream->injectTokens(array(
+            new Twig_Token(Twig_Token::BLOCK_START_TYPE, '', $token->getLine()),
+            new Twig_Token(Twig_Token::NAME_TYPE, 'extends', $token->getLine()),
+            new Twig_Token(Twig_Token::STRING_TYPE, '__parent__', $token->getLine()),
+            new Twig_Token(Twig_Token::BLOCK_END_TYPE, '', $token->getLine()),
+        ));
+
+        $module = $this->parser->parse($stream, array($this, 'decideBlockEnd'), true);
+
+        // override the parent with the correct one
+        $module->setNode('parent', $parent);
+
+        $this->parser->embedTemplate($module);
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_Embed($module->getAttribute('filename'), $module->getAttribute('index'), $variables, $only, $ignoreMissing, $token->getLine(), $this->getTag());
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endembed');
+    }
+
+    public function getTag()
+    {
+        return 'embed';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Extends.php b/public/system/library/template/Twig/TokenParser/Extends.php
new file mode 100644
index 0000000..510417a
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Extends.php
@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Extends a template by another one.
+ *
+ * <pre>
+ *  {% extends "base.html" %}
+ * </pre>
+ */
+class Twig_TokenParser_Extends extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        if (!$this->parser->isMainScope()) {
+            throw new Twig_Error_Syntax('Cannot extend from a block.', $token->getLine(), $this->parser->getFilename());
+        }
+
+        if (null !== $this->parser->getParent()) {
+            throw new Twig_Error_Syntax('Multiple extends tags are forbidden.', $token->getLine(), $this->parser->getFilename());
+        }
+        $this->parser->setParent($this->parser->getExpressionParser()->parseExpression());
+
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+    }
+
+    public function getTag()
+    {
+        return 'extends';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Filter.php b/public/system/library/template/Twig/TokenParser/Filter.php
new file mode 100644
index 0000000..b20dd5b
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Filter.php
@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Filters a section of a template by applying filters.
+ *
+ * <pre>
+ * {% filter upper %}
+ *  This text becomes uppercase
+ * {% endfilter %}
+ * </pre>
+ */
+class Twig_TokenParser_Filter extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $name = $this->parser->getVarName();
+        $ref = new Twig_Node_Expression_BlockReference(new Twig_Node_Expression_Constant($name, $token->getLine()), true, $token->getLine(), $this->getTag());
+
+        $filter = $this->parser->getExpressionParser()->parseFilterExpressionRaw($ref, $this->getTag());
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $block = new Twig_Node_Block($name, $body, $token->getLine());
+        $this->parser->setBlock($name, $block);
+
+        return new Twig_Node_Print($filter, $token->getLine(), $this->getTag());
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endfilter');
+    }
+
+    public function getTag()
+    {
+        return 'filter';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Flush.php b/public/system/library/template/Twig/TokenParser/Flush.php
new file mode 100644
index 0000000..f9ce7c3
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Flush.php
@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Flushes the output to the client.
+ *
+ * @see flush()
+ */
+class Twig_TokenParser_Flush extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_Flush($token->getLine(), $this->getTag());
+    }
+
+    public function getTag()
+    {
+        return 'flush';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/For.php b/public/system/library/template/Twig/TokenParser/For.php
new file mode 100644
index 0000000..3fac511
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/For.php
@@ -0,0 +1,123 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Loops over each item of a sequence.
+ *
+ * <pre>
+ * <ul>
+ *  {% for user in users %}
+ *    <li>{{ user.username|e }}</li>
+ *  {% endfor %}
+ * </ul>
+ * </pre>
+ */
+class Twig_TokenParser_For extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $stream = $this->parser->getStream();
+        $targets = $this->parser->getExpressionParser()->parseAssignmentExpression();
+        $stream->expect(Twig_Token::OPERATOR_TYPE, 'in');
+        $seq = $this->parser->getExpressionParser()->parseExpression();
+
+        $ifexpr = null;
+        if ($stream->nextIf(Twig_Token::NAME_TYPE, 'if')) {
+            $ifexpr = $this->parser->getExpressionParser()->parseExpression();
+        }
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+        $body = $this->parser->subparse(array($this, 'decideForFork'));
+        if ($stream->next()->getValue() == 'else') {
+            $stream->expect(Twig_Token::BLOCK_END_TYPE);
+            $else = $this->parser->subparse(array($this, 'decideForEnd'), true);
+        } else {
+            $else = null;
+        }
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        if (count($targets) > 1) {
+            $keyTarget = $targets->getNode(0);
+            $keyTarget = new Twig_Node_Expression_AssignName($keyTarget->getAttribute('name'), $keyTarget->getLine());
+            $valueTarget = $targets->getNode(1);
+            $valueTarget = new Twig_Node_Expression_AssignName($valueTarget->getAttribute('name'), $valueTarget->getLine());
+        } else {
+            $keyTarget = new Twig_Node_Expression_AssignName('_key', $lineno);
+            $valueTarget = $targets->getNode(0);
+            $valueTarget = new Twig_Node_Expression_AssignName($valueTarget->getAttribute('name'), $valueTarget->getLine());
+        }
+
+        if ($ifexpr) {
+            $this->checkLoopUsageCondition($stream, $ifexpr);
+            $this->checkLoopUsageBody($stream, $body);
+        }
+
+        return new Twig_Node_For($keyTarget, $valueTarget, $seq, $ifexpr, $body, $else, $lineno, $this->getTag());
+    }
+
+    public function decideForFork(Twig_Token $token)
+    {
+        return $token->test(array('else', 'endfor'));
+    }
+
+    public function decideForEnd(Twig_Token $token)
+    {
+        return $token->test('endfor');
+    }
+
+    // the loop variable cannot be used in the condition
+    protected function checkLoopUsageCondition(Twig_TokenStream $stream, Twig_NodeInterface $node)
+    {
+        if ($node instanceof Twig_Node_Expression_GetAttr && $node->getNode('node') instanceof Twig_Node_Expression_Name && 'loop' == $node->getNode('node')->getAttribute('name')) {
+            throw new Twig_Error_Syntax('The "loop" variable cannot be used in a looping condition.', $node->getLine(), $stream->getFilename());
+        }
+
+        foreach ($node as $n) {
+            if (!$n) {
+                continue;
+            }
+
+            $this->checkLoopUsageCondition($stream, $n);
+        }
+    }
+
+    // check usage of non-defined loop-items
+    // it does not catch all problems (for instance when a for is included into another or when the variable is used in an include)
+    protected function checkLoopUsageBody(Twig_TokenStream $stream, Twig_NodeInterface $node)
+    {
+        if ($node instanceof Twig_Node_Expression_GetAttr && $node->getNode('node') instanceof Twig_Node_Expression_Name && 'loop' == $node->getNode('node')->getAttribute('name')) {
+            $attribute = $node->getNode('attribute');
+            if ($attribute instanceof Twig_Node_Expression_Constant && in_array($attribute->getAttribute('value'), array('length', 'revindex0', 'revindex', 'last'))) {
+                throw new Twig_Error_Syntax(sprintf('The "loop.%s" variable is not defined when looping with a condition.', $attribute->getAttribute('value')), $node->getLine(), $stream->getFilename());
+            }
+        }
+
+        // should check for parent.loop.XXX usage
+        if ($node instanceof Twig_Node_For) {
+            return;
+        }
+
+        foreach ($node as $n) {
+            if (!$n) {
+                continue;
+            }
+
+            $this->checkLoopUsageBody($stream, $n);
+        }
+    }
+
+    public function getTag()
+    {
+        return 'for';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/From.php b/public/system/library/template/Twig/TokenParser/From.php
new file mode 100644
index 0000000..f7547eb
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/From.php
@@ -0,0 +1,62 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Imports macros.
+ *
+ * <pre>
+ *   {% from 'forms.html' import forms %}
+ * </pre>
+ */
+class Twig_TokenParser_From extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $macro = $this->parser->getExpressionParser()->parseExpression();
+        $stream = $this->parser->getStream();
+        $stream->expect('import');
+
+        $targets = array();
+        do {
+            $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+
+            $alias = $name;
+            if ($stream->nextIf('as')) {
+                $alias = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+            }
+
+            $targets[$name] = $alias;
+
+            if (!$stream->nextIf(Twig_Token::PUNCTUATION_TYPE, ',')) {
+                break;
+            }
+        } while (true);
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $node = new Twig_Node_Import($macro, new Twig_Node_Expression_AssignName($this->parser->getVarName(), $token->getLine()), $token->getLine(), $this->getTag());
+
+        foreach ($targets as $name => $alias) {
+            if ($this->parser->isReservedMacroName($name)) {
+                throw new Twig_Error_Syntax(sprintf('"%s" cannot be an imported macro as it is a reserved keyword.', $name), $token->getLine(), $stream->getFilename());
+            }
+
+            $this->parser->addImportedSymbol('function', $alias, 'get'.$name, $node->getNode('var'));
+        }
+
+        return $node;
+    }
+
+    public function getTag()
+    {
+        return 'from';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/If.php b/public/system/library/template/Twig/TokenParser/If.php
new file mode 100644
index 0000000..91c0604
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/If.php
@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Tests a condition.
+ *
+ * <pre>
+ * {% if users %}
+ *  <ul>
+ *    {% for user in users %}
+ *      <li>{{ user.username|e }}</li>
+ *    {% endfor %}
+ *  </ul>
+ * {% endif %}
+ * </pre>
+ */
+class Twig_TokenParser_If extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $expr = $this->parser->getExpressionParser()->parseExpression();
+        $stream = $this->parser->getStream();
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+        $body = $this->parser->subparse(array($this, 'decideIfFork'));
+        $tests = array($expr, $body);
+        $else = null;
+
+        $end = false;
+        while (!$end) {
+            switch ($stream->next()->getValue()) {
+                case 'else':
+                    $stream->expect(Twig_Token::BLOCK_END_TYPE);
+                    $else = $this->parser->subparse(array($this, 'decideIfEnd'));
+                    break;
+
+                case 'elseif':
+                    $expr = $this->parser->getExpressionParser()->parseExpression();
+                    $stream->expect(Twig_Token::BLOCK_END_TYPE);
+                    $body = $this->parser->subparse(array($this, 'decideIfFork'));
+                    $tests[] = $expr;
+                    $tests[] = $body;
+                    break;
+
+                case 'endif':
+                    $end = true;
+                    break;
+
+                default:
+                    throw new Twig_Error_Syntax(sprintf('Unexpected end of template. Twig was looking for the following tags "else", "elseif", or "endif" to close the "if" block started at line %d).', $lineno), $stream->getCurrent()->getLine(), $stream->getFilename());
+            }
+        }
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_If(new Twig_Node($tests), $else, $lineno, $this->getTag());
+    }
+
+    public function decideIfFork(Twig_Token $token)
+    {
+        return $token->test(array('elseif', 'else', 'endif'));
+    }
+
+    public function decideIfEnd(Twig_Token $token)
+    {
+        return $token->test(array('endif'));
+    }
+
+    public function getTag()
+    {
+        return 'if';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Import.php b/public/system/library/template/Twig/TokenParser/Import.php
new file mode 100644
index 0000000..85c5c03
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Import.php
@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Imports macros.
+ *
+ * <pre>
+ *   {% import 'forms.html' as forms %}
+ * </pre>
+ */
+class Twig_TokenParser_Import extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $macro = $this->parser->getExpressionParser()->parseExpression();
+        $this->parser->getStream()->expect('as');
+        $var = new Twig_Node_Expression_AssignName($this->parser->getStream()->expect(Twig_Token::NAME_TYPE)->getValue(), $token->getLine());
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $this->parser->addImportedSymbol('template', $var->getAttribute('name'));
+
+        return new Twig_Node_Import($macro, $var, $token->getLine(), $this->getTag());
+    }
+
+    public function getTag()
+    {
+        return 'import';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Include.php b/public/system/library/template/Twig/TokenParser/Include.php
new file mode 100644
index 0000000..0e76dae
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Include.php
@@ -0,0 +1,63 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Includes a template.
+ *
+ * <pre>
+ *   {% include 'header.html' %}
+ *     Body
+ *   {% include 'footer.html' %}
+ * </pre>
+ */
+class Twig_TokenParser_Include extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $expr = $this->parser->getExpressionParser()->parseExpression();
+
+        list($variables, $only, $ignoreMissing) = $this->parseArguments();
+
+        return new Twig_Node_Include($expr, $variables, $only, $ignoreMissing, $token->getLine(), $this->getTag());
+    }
+
+    protected function parseArguments()
+    {
+        $stream = $this->parser->getStream();
+
+        $ignoreMissing = false;
+        if ($stream->nextIf(Twig_Token::NAME_TYPE, 'ignore')) {
+            $stream->expect(Twig_Token::NAME_TYPE, 'missing');
+
+            $ignoreMissing = true;
+        }
+
+        $variables = null;
+        if ($stream->nextIf(Twig_Token::NAME_TYPE, 'with')) {
+            $variables = $this->parser->getExpressionParser()->parseExpression();
+        }
+
+        $only = false;
+        if ($stream->nextIf(Twig_Token::NAME_TYPE, 'only')) {
+            $only = true;
+        }
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return array($variables, $only, $ignoreMissing);
+    }
+
+    public function getTag()
+    {
+        return 'include';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Macro.php b/public/system/library/template/Twig/TokenParser/Macro.php
new file mode 100644
index 0000000..8a7ebd6
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Macro.php
@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Defines a macro.
+ *
+ * <pre>
+ * {% macro input(name, value, type, size) %}
+ *    <input type="{{ type|default('text') }}" name="{{ name }}" value="{{ value|e }}" size="{{ size|default(20) }}" />
+ * {% endmacro %}
+ * </pre>
+ */
+class Twig_TokenParser_Macro extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $stream = $this->parser->getStream();
+        $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+
+        $arguments = $this->parser->getExpressionParser()->parseArguments(true, true);
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+        $this->parser->pushLocalScope();
+        $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+        if ($token = $stream->nextIf(Twig_Token::NAME_TYPE)) {
+            $value = $token->getValue();
+
+            if ($value != $name) {
+                throw new Twig_Error_Syntax(sprintf('Expected endmacro for macro "%s" (but "%s" given).', $name, $value), $stream->getCurrent()->getLine(), $stream->getFilename());
+            }
+        }
+        $this->parser->popLocalScope();
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $this->parser->setMacro($name, new Twig_Node_Macro($name, new Twig_Node_Body(array($body)), $arguments, $lineno, $this->getTag()));
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endmacro');
+    }
+
+    public function getTag()
+    {
+        return 'macro';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Sandbox.php b/public/system/library/template/Twig/TokenParser/Sandbox.php
new file mode 100644
index 0000000..1feadd0
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Sandbox.php
@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Marks a section of a template as untrusted code that must be evaluated in the sandbox mode.
+ *
+ * <pre>
+ * {% sandbox %}
+ *     {% include 'user.html' %}
+ * {% endsandbox %}
+ * </pre>
+ *
+ * @see http://www.twig-project.org/doc/api.html#sandbox-extension for details
+ */
+class Twig_TokenParser_Sandbox extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+        $body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        // in a sandbox tag, only include tags are allowed
+        if (!$body instanceof Twig_Node_Include) {
+            foreach ($body as $node) {
+                if ($node instanceof Twig_Node_Text && ctype_space($node->getAttribute('data'))) {
+                    continue;
+                }
+
+                if (!$node instanceof Twig_Node_Include) {
+                    throw new Twig_Error_Syntax('Only "include" tags are allowed within a "sandbox" section.', $node->getLine(), $this->parser->getFilename());
+                }
+            }
+        }
+
+        return new Twig_Node_Sandbox($body, $token->getLine(), $this->getTag());
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endsandbox');
+    }
+
+    public function getTag()
+    {
+        return 'sandbox';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Set.php b/public/system/library/template/Twig/TokenParser/Set.php
new file mode 100644
index 0000000..5ca614b
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Set.php
@@ -0,0 +1,71 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Defines a variable.
+ *
+ * <pre>
+ *  {% set foo = 'foo' %}
+ *
+ *  {% set foo = [1, 2] %}
+ *
+ *  {% set foo = {'foo': 'bar'} %}
+ *
+ *  {% set foo = 'foo' ~ 'bar' %}
+ *
+ *  {% set foo, bar = 'foo', 'bar' %}
+ *
+ *  {% set foo %}Some content{% endset %}
+ * </pre>
+ */
+class Twig_TokenParser_Set extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $stream = $this->parser->getStream();
+        $names = $this->parser->getExpressionParser()->parseAssignmentExpression();
+
+        $capture = false;
+        if ($stream->nextIf(Twig_Token::OPERATOR_TYPE, '=')) {
+            $values = $this->parser->getExpressionParser()->parseMultitargetExpression();
+
+            $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+            if (count($names) !== count($values)) {
+                throw new Twig_Error_Syntax('When using set, you must have the same number of variables and assignments.', $stream->getCurrent()->getLine(), $stream->getFilename());
+            }
+        } else {
+            $capture = true;
+
+            if (count($names) > 1) {
+                throw new Twig_Error_Syntax('When using set with a block, you cannot have a multi-target.', $stream->getCurrent()->getLine(), $stream->getFilename());
+            }
+
+            $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+            $values = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
+            $stream->expect(Twig_Token::BLOCK_END_TYPE);
+        }
+
+        return new Twig_Node_Set($capture, $names, $values, $lineno, $this->getTag());
+    }
+
+    public function decideBlockEnd(Twig_Token $token)
+    {
+        return $token->test('endset');
+    }
+
+    public function getTag()
+    {
+        return 'set';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Spaceless.php b/public/system/library/template/Twig/TokenParser/Spaceless.php
new file mode 100644
index 0000000..53d906d
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Spaceless.php
@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Remove whitespaces between HTML tags.
+ *
+ * <pre>
+ * {% spaceless %}
+ *      <div>
+ *          <strong>foo</strong>
+ *      </div>
+ * {% endspaceless %}
+ *
+ * {# output will be <div><strong>foo</strong></div> #}
+ * </pre>
+ */
+class Twig_TokenParser_Spaceless extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+        $body = $this->parser->subparse(array($this, 'decideSpacelessEnd'), true);
+        $this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
+
+        return new Twig_Node_Spaceless($body, $lineno, $this->getTag());
+    }
+
+    public function decideSpacelessEnd(Twig_Token $token)
+    {
+        return $token->test('endspaceless');
+    }
+
+    public function getTag()
+    {
+        return 'spaceless';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParser/Use.php b/public/system/library/template/Twig/TokenParser/Use.php
new file mode 100644
index 0000000..4945d03
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParser/Use.php
@@ -0,0 +1,64 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2011 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Imports blocks defined in another template into the current template.
+ *
+ * <pre>
+ * {% extends "base.html" %}
+ *
+ * {% use "blocks.html" %}
+ *
+ * {% block title %}{% endblock %}
+ * {% block content %}{% endblock %}
+ * </pre>
+ *
+ * @see http://www.twig-project.org/doc/templates.html#horizontal-reuse for details.
+ */
+class Twig_TokenParser_Use extends Twig_TokenParser
+{
+    public function parse(Twig_Token $token)
+    {
+        $template = $this->parser->getExpressionParser()->parseExpression();
+        $stream = $this->parser->getStream();
+
+        if (!$template instanceof Twig_Node_Expression_Constant) {
+            throw new Twig_Error_Syntax('The template references in a "use" statement must be a string.', $stream->getCurrent()->getLine(), $stream->getFilename());
+        }
+
+        $targets = array();
+        if ($stream->nextIf('with')) {
+            do {
+                $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+
+                $alias = $name;
+                if ($stream->nextIf('as')) {
+                    $alias = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
+                }
+
+                $targets[$name] = new Twig_Node_Expression_Constant($alias, -1);
+
+                if (!$stream->nextIf(Twig_Token::PUNCTUATION_TYPE, ',')) {
+                    break;
+                }
+            } while (true);
+        }
+
+        $stream->expect(Twig_Token::BLOCK_END_TYPE);
+
+        $this->parser->addTrait(new Twig_Node(array('template' => $template, 'targets' => new Twig_Node($targets))));
+    }
+
+    public function getTag()
+    {
+        return 'use';
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParserBroker.php b/public/system/library/template/Twig/TokenParserBroker.php
new file mode 100644
index 0000000..d88bb43
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParserBroker.php
@@ -0,0 +1,142 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ * (c) 2010 Arnaud Le Blanc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Default implementation of a token parser broker.
+ *
+ * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+class Twig_TokenParserBroker implements Twig_TokenParserBrokerInterface
+{
+    protected $parser;
+    protected $parsers = array();
+    protected $brokers = array();
+
+    /**
+     * Constructor.
+     *
+     * @param array|Traversable $parsers                 A Traversable of Twig_TokenParserInterface instances
+     * @param array|Traversable $brokers                 A Traversable of Twig_TokenParserBrokerInterface instances
+     * @param bool              $triggerDeprecationError
+     */
+    public function __construct($parsers = array(), $brokers = array(), $triggerDeprecationError = true)
+    {
+        if ($triggerDeprecationError) {
+            @trigger_error('The '.__CLASS__.' class is deprecated since version 1.12 and will be removed in 2.0.', E_USER_DEPRECATED);
+        }
+
+        foreach ($parsers as $parser) {
+            if (!$parser instanceof Twig_TokenParserInterface) {
+                throw new LogicException('$parsers must a an array of Twig_TokenParserInterface.');
+            }
+            $this->parsers[$parser->getTag()] = $parser;
+        }
+        foreach ($brokers as $broker) {
+            if (!$broker instanceof Twig_TokenParserBrokerInterface) {
+                throw new LogicException('$brokers must a an array of Twig_TokenParserBrokerInterface.');
+            }
+            $this->brokers[] = $broker;
+        }
+    }
+
+    /**
+     * Adds a TokenParser.
+     *
+     * @param Twig_TokenParserInterface $parser A Twig_TokenParserInterface instance
+     */
+    public function addTokenParser(Twig_TokenParserInterface $parser)
+    {
+        $this->parsers[$parser->getTag()] = $parser;
+    }
+
+    /**
+     * Removes a TokenParser.
+     *
+     * @param Twig_TokenParserInterface $parser A Twig_TokenParserInterface instance
+     */
+    public function removeTokenParser(Twig_TokenParserInterface $parser)
+    {
+        $name = $parser->getTag();
+        if (isset($this->parsers[$name]) && $parser === $this->parsers[$name]) {
+            unset($this->parsers[$name]);
+        }
+    }
+
+    /**
+     * Adds a TokenParserBroker.
+     *
+     * @param Twig_TokenParserBroker $broker A Twig_TokenParserBroker instance
+     */
+    public function addTokenParserBroker(Twig_TokenParserBroker $broker)
+    {
+        $this->brokers[] = $broker;
+    }
+
+    /**
+     * Removes a TokenParserBroker.
+     *
+     * @param Twig_TokenParserBroker $broker A Twig_TokenParserBroker instance
+     */
+    public function removeTokenParserBroker(Twig_TokenParserBroker $broker)
+    {
+        if (false !== $pos = array_search($broker, $this->brokers)) {
+            unset($this->brokers[$pos]);
+        }
+    }
+
+    /**
+     * Gets a suitable TokenParser for a tag.
+     *
+     * First looks in parsers, then in brokers.
+     *
+     * @param string $tag A tag name
+     *
+     * @return null|Twig_TokenParserInterface A Twig_TokenParserInterface or null if no suitable TokenParser was found
+     */
+    public function getTokenParser($tag)
+    {
+        if (isset($this->parsers[$tag])) {
+            return $this->parsers[$tag];
+        }
+        $broker = end($this->brokers);
+        while (false !== $broker) {
+            $parser = $broker->getTokenParser($tag);
+            if (null !== $parser) {
+                return $parser;
+            }
+            $broker = prev($this->brokers);
+        }
+    }
+
+    public function getParsers()
+    {
+        return $this->parsers;
+    }
+
+    public function getParser()
+    {
+        return $this->parser;
+    }
+
+    public function setParser(Twig_ParserInterface $parser)
+    {
+        $this->parser = $parser;
+        foreach ($this->parsers as $tokenParser) {
+            $tokenParser->setParser($parser);
+        }
+        foreach ($this->brokers as $broker) {
+            $broker->setParser($parser);
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/TokenParserBrokerInterface.php b/public/system/library/template/Twig/TokenParserBrokerInterface.php
new file mode 100644
index 0000000..3ec2a88
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParserBrokerInterface.php
@@ -0,0 +1,46 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ * (c) 2010 Arnaud Le Blanc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by token parser brokers.
+ *
+ * Token parser brokers allows to implement custom logic in the process of resolving a token parser for a given tag name.
+ *
+ * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
+ *
+ * @deprecated since 1.12 (to be removed in 2.0)
+ */
+interface Twig_TokenParserBrokerInterface
+{
+    /**
+     * Gets a TokenParser suitable for a tag.
+     *
+     * @param string $tag A tag name
+     *
+     * @return null|Twig_TokenParserInterface A Twig_TokenParserInterface or null if no suitable TokenParser was found
+     */
+    public function getTokenParser($tag);
+
+    /**
+     * Calls Twig_TokenParserInterface::setParser on all parsers the implementation knows of.
+     *
+     * @param Twig_ParserInterface $parser A Twig_ParserInterface interface
+     */
+    public function setParser(Twig_ParserInterface $parser);
+
+    /**
+     * Gets the Twig_ParserInterface.
+     *
+     * @return null|Twig_ParserInterface A Twig_ParserInterface instance or null
+     */
+    public function getParser();
+}
diff --git a/public/system/library/template/Twig/TokenParserInterface.php b/public/system/library/template/Twig/TokenParserInterface.php
new file mode 100644
index 0000000..12ec396
--- /dev/null
+++ b/public/system/library/template/Twig/TokenParserInterface.php
@@ -0,0 +1,43 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Interface implemented by token parsers.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface Twig_TokenParserInterface
+{
+    /**
+     * Sets the parser associated with this token parser.
+     *
+     * @param Twig_Parser $parser A Twig_Parser instance
+     */
+    public function setParser(Twig_Parser $parser);
+
+    /**
+     * Parses a token and returns a node.
+     *
+     * @param Twig_Token $token A Twig_Token instance
+     *
+     * @return Twig_NodeInterface A Twig_NodeInterface instance
+     *
+     * @throws Twig_Error_Syntax
+     */
+    public function parse(Twig_Token $token);
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag();
+}
diff --git a/public/system/library/template/Twig/TokenStream.php b/public/system/library/template/Twig/TokenStream.php
new file mode 100644
index 0000000..016f812
--- /dev/null
+++ b/public/system/library/template/Twig/TokenStream.php
@@ -0,0 +1,155 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2009 Fabien Potencier
+ * (c) 2009 Armin Ronacher
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Represents a token stream.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_TokenStream
+{
+    protected $tokens;
+    protected $current = 0;
+    protected $filename;
+
+    /**
+     * Constructor.
+     *
+     * @param array  $tokens   An array of tokens
+     * @param string $filename The name of the filename which tokens are associated with
+     */
+    public function __construct(array $tokens, $filename = null)
+    {
+        $this->tokens = $tokens;
+        $this->filename = $filename;
+    }
+
+    /**
+     * Returns a string representation of the token stream.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return implode("\n", $this->tokens);
+    }
+
+    public function injectTokens(array $tokens)
+    {
+        $this->tokens = array_merge(array_slice($this->tokens, 0, $this->current), $tokens, array_slice($this->tokens, $this->current));
+    }
+
+    /**
+     * Sets the pointer to the next token and returns the old one.
+     *
+     * @return Twig_Token
+     */
+    public function next()
+    {
+        if (!isset($this->tokens[++$this->current])) {
+            throw new Twig_Error_Syntax('Unexpected end of template.', $this->tokens[$this->current - 1]->getLine(), $this->filename);
+        }
+
+        return $this->tokens[$this->current - 1];
+    }
+
+    /**
+     * Tests a token, sets the pointer to the next one and returns it or throws a syntax error.
+     *
+     * @return Twig_Token|null The next token if the condition is true, null otherwise
+     */
+    public function nextIf($primary, $secondary = null)
+    {
+        if ($this->tokens[$this->current]->test($primary, $secondary)) {
+            return $this->next();
+        }
+    }
+
+    /**
+     * Tests a token and returns it or throws a syntax error.
+     *
+     * @return Twig_Token
+     */
+    public function expect($type, $value = null, $message = null)
+    {
+        $token = $this->tokens[$this->current];
+        if (!$token->test($type, $value)) {
+            $line = $token->getLine();
+            throw new Twig_Error_Syntax(sprintf('%sUnexpected token "%s" of value "%s" ("%s" expected%s).',
+                $message ? $message.'. ' : '',
+                Twig_Token::typeToEnglish($token->getType()), $token->getValue(),
+                Twig_Token::typeToEnglish($type), $value ? sprintf(' with value "%s"', $value) : ''),
+                $line,
+                $this->filename
+            );
+        }
+        $this->next();
+
+        return $token;
+    }
+
+    /**
+     * Looks at the next token.
+     *
+     * @param int $number
+     *
+     * @return Twig_Token
+     */
+    public function look($number = 1)
+    {
+        if (!isset($this->tokens[$this->current + $number])) {
+            throw new Twig_Error_Syntax('Unexpected end of template.', $this->tokens[$this->current + $number - 1]->getLine(), $this->filename);
+        }
+
+        return $this->tokens[$this->current + $number];
+    }
+
+    /**
+     * Tests the current token.
+     *
+     * @return bool
+     */
+    public function test($primary, $secondary = null)
+    {
+        return $this->tokens[$this->current]->test($primary, $secondary);
+    }
+
+    /**
+     * Checks if end of stream was reached.
+     *
+     * @return bool
+     */
+    public function isEOF()
+    {
+        return $this->tokens[$this->current]->getType() === Twig_Token::EOF_TYPE;
+    }
+
+    /**
+     * Gets the current token.
+     *
+     * @return Twig_Token
+     */
+    public function getCurrent()
+    {
+        return $this->tokens[$this->current];
+    }
+
+    /**
+     * Gets the filename associated with this stream.
+     *
+     * @return string
+     */
+    public function getFilename()
+    {
+        return $this->filename;
+    }
+}
diff --git a/public/system/library/template/Twig/Util/DeprecationCollector.php b/public/system/library/template/Twig/Util/DeprecationCollector.php
new file mode 100644
index 0000000..e406f0a
--- /dev/null
+++ b/public/system/library/template/Twig/Util/DeprecationCollector.php
@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Util_DeprecationCollector
+{
+    private $twig;
+    private $deprecations;
+
+    public function __construct(Twig_Environment $twig)
+    {
+        $this->twig = $twig;
+    }
+
+    /**
+     * Returns deprecations for templates contained in a directory.
+     *
+     * @param string $dir A directory where templates are stored
+     * @param string $ext Limit the loaded templates by extension
+     *
+     * @return array() An array of deprecations
+     */
+    public function collectDir($dir, $ext = '.twig')
+    {
+        $iterator = new RegexIterator(
+            new RecursiveIteratorIterator(
+                new RecursiveDirectoryIterator($dir), RecursiveIteratorIterator::LEAVES_ONLY
+            ), '{'.preg_quote($ext).'$}'
+        );
+
+        return $this->collect(new Twig_Util_TemplateDirIterator($iterator));
+    }
+
+    /**
+     * Returns deprecations for passed templates.
+     *
+     * @param Iterator $iterator An iterator of templates (where keys are template names and values the contents of the template)
+     *
+     * @return array() An array of deprecations
+     */
+    public function collect(Iterator $iterator)
+    {
+        $this->deprecations = array();
+
+        set_error_handler(array($this, 'errorHandler'));
+
+        foreach ($iterator as $name => $contents) {
+            try {
+                $this->twig->parse($this->twig->tokenize($contents, $name));
+            } catch (Twig_Error_Syntax $e) {
+                // ignore templates containing syntax errors
+            }
+        }
+
+        restore_error_handler();
+
+        $deprecations = $this->deprecations;
+        $this->deprecations = array();
+
+        return $deprecations;
+    }
+
+    /**
+     * @internal
+     */
+    public function errorHandler($type, $msg)
+    {
+        if (E_USER_DEPRECATED === $type) {
+            $this->deprecations[] = $msg;
+        }
+    }
+}
diff --git a/public/system/library/template/Twig/Util/TemplateDirIterator.php b/public/system/library/template/Twig/Util/TemplateDirIterator.php
new file mode 100644
index 0000000..3fb8932
--- /dev/null
+++ b/public/system/library/template/Twig/Util/TemplateDirIterator.php
@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Util_TemplateDirIterator extends IteratorIterator
+{
+    public function current()
+    {
+        return file_get_contents(parent::current());
+    }
+
+    public function key()
+    {
+        return (string) parent::key();
+    }
+}
diff --git a/public/system/library/template/template.php b/public/system/library/template/template.php
new file mode 100644
index 0000000..0c3225b
--- /dev/null
+++ b/public/system/library/template/template.php
@@ -0,0 +1,26 @@
+<?php
+namespace Template;
+final class Template {
+	private $data = array();
+		
+	public function set($key, $value) {
+		$this->data[$key] = $value;
+	}
+	
+	public function render($template) {
+		$file = DIR_TEMPLATE . $template . '.tpl';
+
+		if (is_file($file)) {
+			extract($this->data);
+
+			ob_start();
+
+			require($file);
+
+			return ob_get_clean();
+		}
+
+		throw new \Exception('Error: Could not load template ' . $file . '!');
+		exit();
+	}	
+}
diff --git a/public/system/library/template/twig.php b/public/system/library/template/twig.php
new file mode 100644
index 0000000..e60c2a5
--- /dev/null
+++ b/public/system/library/template/twig.php
@@ -0,0 +1,41 @@
+<?php
+namespace Template;
+final class Twig {
+	private $twig;
+	private $data = array();
+	
+	public function __construct() {
+		// include and register Twig auto-loader
+		include_once(DIR_SYSTEM . 'library/template/Twig/Autoloader.php');
+		
+		\Twig_Autoloader::register();
+	}
+	
+	public function set($key, $value) {
+		$this->data[$key] = $value;
+	}
+	
+	public function render($template, $cache = false) {
+		// specify where to look for templates
+		$loader = new \Twig_Loader_Filesystem(DIR_TEMPLATE);
+
+		// initialize Twig environment
+		$config = array('autoescape' => false);
+
+		if ($cache) {
+			$config['cache'] = DIR_CACHE;
+		}
+
+		$this->twig = new \Twig_Environment($loader, $config);
+		
+		try {
+			// load template
+			$template = $this->twig->loadTemplate($template . '.twig');
+			
+			return $template->render($this->data);
+		} catch (Exception $e) {
+			trigger_error('Error: Could not load template ' . $template . '!');
+			exit();	
+		}	
+	}	
+}