Added /roster command with nick option to change handle
Added sub to /notify preferences output

Removed unused "status" value for /notify autocompleter
Added /roster autocomplete
Show nickname in status updates if available
Changing roster handle with no argument clears handle
Show contacts handle as window title in chat
Show handle rather than jid in /who output if exists
Use handle in chat windows if available
Use handle in incoming message console when exists
Use handle in /msg command
Use handle for /info command
Pass jid when creating new window for /msg with no message
Added jid autocompleter for /roster nick command
Roster handle changes handled correctly
Finished handle usage
Removed debug
Merge remote-tracking branch 'upstream/master'