BUGS:

* Should not stay on buddy buffer when one moves to a group
* Pending message not displayed if buddy outside Contact window
* We should rebuild the buddy list when receiving a message from an offline
  buddy (or invisible/just hidden).
* Presence notification is always accepted.
* Messages in hidden (shrunk) groups are not visible.
  Maybe we should create "*_msg_[gs]etflag()" functions, which
  would update groups message flags too. (?)


TODO:

* Display status
* show (how?) we can scroll in roster if not all buddies are displayed
* Get timestamp for offline messages

* Commands! :-)
  - /roster <hide_offline|show_offline|top|bottom>
  - /group <expand|shrink>
  - /say blabla
  - /say_to <jid> blabla
  - /add <jid> [Name]
  - /del [jid]
  - /move [\<jid\>] <group>
  - /nick (== rename <me> $@)
  - /rename [\<jid\>] Name
  - /info [jid]
  - /request_auth [jid]
  - /send_auth [jid]
  - /status [online|avail|invisible|free|dnd|busy|notavail|away]
    (and common shortcuts: /away, /online, /busy, /dnd)
  - /rawxml...
  - /search <\<jid\>|name>
  - /clear
  - /help
* Command line history (^P/^N)
* External commands for events
* Multi-lines
* Handle window resize
* Read history
* Shortcut to jump to next message received (shift-tab?)
* File transfer? :)
* Conferences :))
* Show status changes in buddy window (if open)?  Could be great!
* Auto away