Fixes Storage README (GoogleCloudPlatform#506)

Author: bshaffer

storage/README.md

@@ -19,7 +19,7 @@ This simple command-line application demonstrates how to invoke Google Cloud Sto
 
     ```sh
     $ git clone https://github.com/GoogleCloudPlatform/php-docs-samples
-    $ cd php-docs-samples/storage/cli
+    $ cd php-docs-samples/storage
     ```
 4.  **Install dependencies** via [Composer](http://getcomposer.org/doc/00-intro.md).
     Run `php composer.phar install` (if composer is installed locally) or `composer install`