[Xmonad] darcs patch: move Layout stuff into class (hokey firs... (and 1 more)

Here's a cleaner Layout class patch. I've removed the ugly OldLayout, and now we've got one data type per Layout in Operations. This changes Config a little, since Full is now a data constructor, instead of the function full. We could, of course, define a function of the same name, but that seems a waste of space, although it would have the (minor) advantage of allowing the implementations to remain abstract. David Fri Sep 14 17:59:59 EDT 2007 David Roundy <droundy@darcs.net> * move Layout stuff into class (hokey first cut). Thu Sep 20 11:52:37 EDT 2007 David Roundy <droundy@darcs.net> * eliminate ugly OldLayout.