Iron.io config less error prone.

In iron.io settings 'token' is the first field and 'Project ID' is the second. The proposed order makes it less error prone.

app/config/queue.php

@@ -51,8 +51,8 @@ return array(
 		'iron' => array(
 			'driver'  => 'iron',
 			'host'    => 'mq-aws-us-east-1.iron.io',
-			'project' => 'your-project-id',
 			'token'   => 'your-token',
+			'project' => 'your-project-id',
 			'queue'   => 'your-queue-name',
 		),