Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

autoload.php

@@ -0,0 +1,19 @@
+<?php
+
+/**
+ * @file
+ * Includes the autoloader created by Composer.
+ *
+ * This file can be edited to change the autoloader if you are managing a
+ * project's dependencies using Composer. If Drupal code requires the
+ * autoloader, it should always be loaded using this file so that projects
+ * using Composer continue to work.
+ *
+ * @see composer.json
+ * @see index.php
+ * @see core/install.php
+ * @see core/rebuild.php
+ * @see core/modules/statistics/statistics.php
+ */
+
+return require __DIR__ . '/core/vendor/autoload.php';