[Xmonad] darcs patch: move Spiral to LayoutHelpers. (and 3 more)

Hi all, Here's a massive patch to move code over to the new doLayout. I don't recall what tabbed+Xinerama did before, but right now the tabs are only properly printed on the screen that has focus (at least using LayoutScreens to fake Xinerama). I haven't figured out why this is, and am tired, so this is where this is going to be left for the day. It doesn't seem to me like a big deal, since you can't click on those tabs until you put the focus on that screen. Not that I don't want to fix it, but I would like to see these patches applied in spite of the problem, since this particular breakage is mild enough that it shouldn't hurt anyone's productivity. David Sat Jun 23 07:35:16 PDT 2007 David Roundy * move Spiral to LayoutHelpers. Sat Jun 23 07:35:42 PDT 2007 David Roundy * introduce idModify which is just "const (return Nothing)". Sat Jun 23 07:37:45 PDT 2007 David Roundy * move Accordian to use idModify. Sat Jun 23 14:09:52 PDT 2007 David Roundy * make everything work with new doLayout. This modifies all the contrib modules to work (so far as I know) with the new contrib layout. The exception is the LayoutHooks module, which isn't used. It exports an API that is inherently unsafe, so far as I can tell (and always has been).