Websocket object in route doesn't get correct timeout when using gevent middleware

Example:

``` python
websocket = GeventWebSocket(app, timeout=60*60)

@websocket.route("/ws")
def my_ws(ws):
     print ws.timeout  # prints 60 instead of 3600
```

I believe this is because the timeout is missing from the constructor in https://github.com/zeekay/flask-uwsgi-websocket/blob/master/flask_uwsgi_websocket/_gevent.py#L56
