[Xmonad] darcs patch: update LayoutHelpers to work with new La... (and 2 more)

Hi all, This is (I think) a working version of the new LayoutHelpers, along with a NoBorders that makes use of it. I actually really like this new LayoutModifier class, and expect it to be pretty easy to use! :) David Sun Sep 23 07:49:29 EDT 2007 David Roundy * update LayoutHelpers to work with new Layout class. Sun Sep 23 08:17:23 EDT 2007 David Roundy * add a hook to LayoutHelpers. Sun Sep 23 15:26:40 EDT 2007 David Roundy * Update NoBorders and LayoutHelpers.