Added twig, smarty and php-markdown dependencies, vendor is gitignored now

.gitignore

@@ -11,3 +11,6 @@ nbproject
 
 # windows thumbnail cache
 Thumbs.db
+
+# composer vendor dir
+vendor

composer.json

@@ -67,6 +67,9 @@
 		"framework/yiic"
 	],
 	"require": {
-		"php": ">=5.3.0"
+		"php": ">=5.3.0",
+		"michelf/php-markdown": "1.3",
+		"twig/twig": "1.12.*",
+		"smarty/smarty": "3.1.*"
 	}
 }