[xmonad] Upgrading repo formats

[Gwern Branwen]

While waiting on a slow connection today to darcs get XMC, I had time
to ponder. The patches are (or would be) in my global cache, so it
could go much faster. Why doesn't it? Because xmonad-contrib and
xmonad-core are both still using darcs-1 fomatted repositories.

Is there any particular reason to not upgrade? Even Debian Stable has
Darcs 2.x (http://packages.debian.org/lenny/darcs), so it's not as if
there are many people who would be unable to do a darcs get.

-- 
gwern