[Xmonad] darcs patch: Note that SimpleStacking is incompatible with Xinerama

Tue Jun 26 21:54:26 MDT 2007 Jason Creighton * Note that SimpleStacking is incompatible with Xinerama It's unclear to me what SimpleStacking is supposed to accomplish, so I'm just going to note that it doesn't work with Xinerama. (Due to assuming that the current workspace is the one being laid out)