Ability to make the server websocket traffic first. in standalone.py

```
Currently there is no way in standalone.py to have the 
server initiate traffic (after handshake done). It would be very useful to have 
that feature so that we can test server initiated traffic.


```

Original issue reported on code.google.com by `vrnat...@gmail.com` on 9 Nov 2012 at 2:29
