Allow simple chat feature in user workspace. Alert notification in tab title if new message arrives.
Implemented simple chat features. See https://github.com/zanata/zanata/commit/b5cc7a683ca49c86028c05d3eb82fc0dafccba89
VERIFIED with Zanata version 1.7-SNAPSHOT (20120703-0952)
A couple of notes: You can chat with other users who are in the same project workspace. Pressing Enter doesn't send the message at the moment, you need to mouse click "send".