WAMP1 + SessionProvider?
Hi.

I have this config:

``` php
$session = new SessionProvider(
        new Chat,
        new Handler\PdoSessionHandler($pdo,array(
            'db_table'=>'sessions',
            'db_id_col'=>'id',
            'db_data_col'=>'data',
        ))
);
$app = new App('xxx.xxx.xxx','10081','0.0.0.0');
$app->route('/chat',$session);
$app->run();
```

When i start this script i get:

PHP Catchable fatal error:  Argument 1 passed to Ratchet\Session\SessionProvider::__construct() must implement interface Ratchet\MessageComponentInterface, instance of MyApp\Chat given, called in server/bin/new.php on line 20 and defined in /vendor/cboden/ratchet/src/Ratchet/Session/SessionProvider.php on line 47

My base app class fully same as [Chatroom example script](https://github.com/ratchetphp/socketo.me/blob/master/src/Ratchet/Website/Chat/ChatRoom.php), and it works fine with implements WampServerInterface.

SessionProvider requires MessageComponentInterface.

When i change WampServerInterface to MessageComponentInterface in Chat application, i can't connect to server.

I don't understand how to do this.. :-/ Please somebody help me.
