Add info on roster callback
Give visual indication/tooltips about MUC user roles
Split ChatRooms tests out into their own spec file
Add a test to check that moderators are highlighted
Add initial support for configuring chatrooms.

For now we just create an instant chatroom, but eventually we must provide a
way through the UI in which the user can request to configure the room.
Add prefs icon
Merge branch 'master' of github.com:jcbrand/converse.js