Fixed the delay in returning results

- xc now waits for a result for a little while before returning to the
  prompt
- added a user-tag tool to dxmms2
- bumped the copyright notice
- removed the 'currying' option. Never used.
- properly detaching child processes in xce-serv
Added album-tagging

- actually tags each member of the album due to xmms2 limitations
  (features)
Added and rewrote commands

- added: shuffle, seek, +fav-album
- rewrote: tag-album, search, +fav

    +fav now uses a "track appreciation factor" that weights a +fav more
    heavily when it's in the middle of the song. Uses a simple V-shaped
    buildup and falloff
Added a "clear playlist" command
Added a track-progression indicator (xmms2-string)

- Changes the color of the track-info based on the progression through
  the track. Designed to work with xmobar, but can be modified to use
  however you want