[xmonad] darcs patch: fix documentation to match implementation (and 2 more)

[daniel at wagner-home.com]

Fri Nov 13 21:13:28 EST 2009  daniel at wagner-home.com
  * fix documentation to match implementation

Fri Nov 13 21:36:16 EST 2009  daniel at wagner-home.com
  * generalize IO actions to MonadIO m => m actions
  
  This should not cause any working configs to stop working, because IO is an instance of MonadIO, and because complete configs will pin down the type of the call to IO.  Note that XMonad.Config.Arossato is not a complete config, and so it needed some tweaks; with a main function, this should not be a problem.

Sat Nov 14 00:15:09 EST 2009  daniel at wagner-home.com
  * rework XMonad.Util.Dzen
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