* some changes

* moved some admin html code from php to twig templates (.html files)
* minimum PHP version required by installer is now 5.1.2, cause of spl_autoload_register functon.
* depracated Twig to version 1.20.0 cause of Autoloader
* removed unused admin stylish template

system/libs/twig/FileExtensionEscapingStrategy.php

@@ -1,11 +1,49 @@
 <?php
 
-namespace Twig;
+/*
+ * 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_exists('Twig_FileExtensionEscapingStrategy');
-
-if (\false) {
-    class FileExtensionEscapingStrategy extends \Twig_FileExtensionEscapingStrategy
+/**
+ * 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 $filename The template file name
+     *
+     * @return string The escaping strategy name to use
+     */
+    public static function guess($filename)
     {
+        if (!preg_match('{\.(js|css|txt)(?:\.[^/\\\\]+)?$}', $filename, $match)) {
+            return 'html';
+        }
+
+        switch ($match[1]) {
+            case 'js':
+                return 'js';
+
+            case 'css':
+                return 'css';
+
+            case 'txt':
+                return false;
+        }
     }
 }