davidfowl/JabbR — pull request #578 by dpatti (2012-08-11 22:51:17+00:00)
Title: Announce topic changes to everyone in room as notification

This seems to be a pretty common thing in chat clients, so I thought it would also make sense here. Preview:

![Topic Announcements](https://trello-attachments.s3.amazonaws.com/4fdbaf52e902d4c23d0b0a0d/500bc42fcad9b1ed74203b3b/5cbeca7380484d56caa02d72a9ed442d/upload_2012-08-11_at_6.49.45_pm.png)