loqui/im — pull request #576 by TitanNano (2014-11-19 21:43:11+00:00)
Title: Whats App presence improvement

this improves the presence indication for Whats App:
- add available to the status when a new "PresenceAvailable" message arrives
- add timestamp to the status when a new "PresenceUnavailable" message arrives
- don't wait 300 seconds until we mark someone as unavailable, whats app tells us that right away