add autoloader file

Author: rwifeng

autoload.php

@@ -0,0 +1,9 @@
+<?php 
+
+$path = __DIR__ . DIRECTORY_SEPARATOR . 'src'; 
+set_include_path(get_include_path() . PATH_SEPARATOR . $path);
+
+spl_autoload_extensions('.php');
+spl_autoload_register();
+
+require_once 'src/Qiniu/functions.php';