[Xmonad] darcs patch: some renaming of classes and data types. (and 1 more)

Here I fix up Spiral. David Sat Sep 29 15:12:38 EDT 2007 David Roundy <droundy@darcs.net> * some renaming of classes and data types. Tue Oct 2 12:47:35 EDT 2007 David Roundy <droundy@darcs.net> * make Spiral work with new layout class.