Update README.md and composer.json

Addresses googleapis#341

Author: ltrebing

README.md

@@ -25,8 +25,7 @@ For the latest installation and setup instructions, see [the documentation](http
 See the examples/ directory for examples of the key client features.
 ```PHP
 <?php
-  require_once 'Google/Client.php';
-  require_once 'Google/Service/Books.php';
+  require_once 'google-api-php-client/autoload.php'; // or wherever autoload.php is located
   $client = new Google_Client();
   $client->setApplicationName("Client_Library_Examples");
   $client->setDeveloperKey("YOUR_APP_KEY");

composer.json

@@ -16,7 +16,6 @@
             "src/"
         ]
     },
-    "include-path": ["src/"],
     "extra": {
         "branch-alias": {
             "dev-master": "1.0.x-dev"