Update ManageDocks to the new ManageHook system, remove the gap setting code in favor of AvoidStruts
Update ManageDocks to the new ManageHook system, remove the gap setting code in favor of AvoidStruts

darcs-hash:20071209134225-a5988-dd485354446755d6fff36168d11ba33fc91cd3e2

jthornber/XMonadContrib,jthornber/XMonadContrib