* 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/Error/Error.php

@@ -1,11 +0,0 @@
-<?php
-
-namespace Twig\Error;
-
-class_exists('Twig_Error');
-
-if (\false) {
-    class Error extends \Twig_Error
-    {
-    }
-}

system/libs/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);
+    }
+}

system/libs/twig/Error/LoaderError.php

@@ -1,11 +0,0 @@
-<?php
-
-namespace Twig\Error;
-
-class_exists('Twig_Error_Loader');
-
-if (\false) {
-    class LoaderError extends \Twig_Error_Loader
-    {
-    }
-}

system/libs/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
+{
+}

system/libs/twig/Error/RuntimeError.php

@@ -1,11 +0,0 @@
-<?php
-
-namespace Twig\Error;
-
-class_exists('Twig_Error_Runtime');
-
-if (\false) {
-    class RuntimeError extends \Twig_Error_Runtime
-    {
-    }
-}

system/libs/twig/Error/Syntax.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 a syntax error occurs during lexing or parsing of a template.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Twig_Error_Syntax extends Twig_Error
+{
+}

system/libs/twig/Error/SyntaxError.php

@@ -1,11 +0,0 @@
-<?php
-
-namespace Twig\Error;
-
-class_exists('Twig_Error_Syntax');
-
-if (\false) {
-    class SyntaxError extends \Twig_Error_Syntax
-    {
-    }
-}