Replacing outdated WebSocket with ws4py

[remram44]

This feels hacky (but works).

Instead of reimplementing the RFC, I used ws4py's implementation.

This needs extensive testing. I'm also not content with the dup() call, there must be a way to prevent Django from fiddling with the socket...

[gregmuellegger]

This looks really good! Thanks for your efforts! I hope to find time to integrate these changes -- but before I can merge them, they need some tests. The current test suite won't run.

[zmasek]

Is there any chance this will get integrated? I've been playing for a while with that code. I can't say if it's successful since I don't know that much about sockets yet. I've been using Arduino to get data into the Raspberry PI where I'm having a stack made from nginx, circus, chaussette, ws4py, gevent, zmq and django. Right now it sends data to the client, but I didn't try to send data from the browser back to the server yet.