[Xmonad] darcs patch: Make a String description part of each L... (and 1 more)

This is needed in order to allow layouts to be readable that aren't included in defaultLayouts (e.g. layouts that previously were in defaultLayouts). David Mon Sep 24 14:57:53 EDT 2007 David Roundy * Make a String description part of each Layout. Tue Sep 25 13:41:34 EDT 2007 David Roundy * add support for parseable layouts not in the default.