Update to latest gevent-socketio

[sontek]

Its very sexy and has lots of new changes.

https://github.com/abourget/gevent-socketio
http://gevent-socketio.readthedocs.org/en/latest/index.html

[sontek]

Also it supports 0.9.6 now

[stephenmcd]

Yep this is absolutely planned. I'm working on another project https://github.com/stephenmcd/gnotty which uses the latest gevent-socketio just to get a feel for how it all works, and that will be a good lead-in to upgrading django-socketio.

Gonna close this since there's already an open issue for it: #19