[Xmonad] darcs patch: added workspaces to hs-boot (needed by XMonadContrib.C...

Hi, I tried to send this before, but with a wrong from address. The number of workspaces is something that is needed by Commands, and could be useful for other modules too. Ciao Andrea ps: following a patch to Command.hs to make it trackable from MetaModule Sat Jul 28 15:17:56 CEST 2007 Andrea Rossato * added workspaces to hs-boot (needed by XMonadContrib.Commands and possibly other modules)