Added vendor/ directory for Composer's installed files

vendor/composer/autoload_namespaces.php

@@ -0,0 +1,13 @@
+<?php
+
+// autoload_namespaces.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = dirname($vendorDir);
+
+return array(
+    'Twig_' => array($vendorDir . '/twig/twig/lib'),
+    'Slim' => array($vendorDir . '/slim/slim'),
+    'Doctrine\\Common\\Inflector\\' => array($vendorDir . '/doctrine/inflector/lib'),
+    'Carbon' => array($vendorDir . '/nesbot/carbon/src'),
+);