[xmonad] Bluetile backport

[Jan Vornberger]

Hi there!

Just wanted to quickly let you know: With the fair number of outstanding
patches and a possible repository migration still to do, it seems like a
next xmonad release is still a little bit in the future.
So I worked on a temporary solution for the meantime and managed to
backport Bluetile to work with the xmonad release 0.9.1. So this makes
packaging possible/much easier now and Joachim actually already created
a package for Debian. I'm excited to see how this can help the Bluetile
effort. Thx Joachim! :-)

Regards,
Jan