add Twig & refactor poche

inc/Twig/Extensions/Grammar.php

@@ -0,0 +1,30 @@
+<?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.
+ */
+abstract class Twig_Extensions_Grammar implements Twig_Extensions_GrammarInterface
+{
+    protected $name;
+    protected $parser;
+
+    public function __construct($name)
+    {
+        $this->name = $name;
+    }
+
+    public function setParser(Twig_ParserInterface $parser)
+    {
+        $this->parser = $parser;
+    }
+
+    public function getName()
+    {
+        return $this->name;
+    }
+}