Reverted back hchannel to use original google channel api. essentially revert back to commit 1f09d83a51e00d0366ba177976f50993c531d6e9
Changes in chat and channel presence

1. Some server and client refactoring in chat functionality
2. Added server hook points for detecting user presence
some changes reverted back
Merge branch 'hayate-vwr-with-google-channel'

Conflicts:
	static/main.js
	warroom/urls.py
	warroom/views.py
Merge branch 'master' of https://github.com/vrbala/hayate