[xmonad] Announcement: xmonad-extras 0.9.1 released

This is mainly a compatability release, because I forgot to add upper version bounds on the dependencies in the previous release, which caused a build failure due to a new version of the libmpd-bindings. This version also adds XMonad.Config.Alt by Adam Vogt, a new, experimental approach to configuring xmonad that is intended to make the configuration simpler, more modular and to address difficulties that arise when enabling multiple extensions. Hackage: http://hackage.haskell.org/package/xmonad-extras-0.9.1 Documentation is available at: http://projects.haskell.org/xmonad-extras/