* 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/SimpleTest.php

@@ -0,0 +1,52 @@
+<?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',
+        ), $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'];
+    }
+}