[Xmonad] darcs patch: eliminate a few Eq a constraints in Stac... (and 1 more)

Thu Sep 20 17:01:43 EDT 2007 David Roundy <droundy@darcs.net> * eliminate a few Eq a constraints in StackSet. Thu Sep 20 17:05:27 EDT 2007 David Roundy <droundy@darcs.net> * remove unneeded Ord constraint.