Fixed autoaway
Use nickname to jid mapping when sending room invites
Show nickname rather than jid in room invites
Sort contacts on /who output
Sort room participants on /who command
Show participant count in chat rooms
Added /leave command
Use waddstr for incoming messages to avoid truncation

fixes #8
Added autocomplete to /sub deny
Include subscription states of "both" and "to" in /who output
Added roster list when using /roster with no args
Added /roster add command
Added /roster remove command
Added autocomplete for /roster remove
Added message in console on /roster add
Added message in console on /roster remove
Updated help for /roster command
Added group add and group remove to /roster command
Added 'any' to /who command
Added group argument to /who