Addition of Machine window property.
Addition of Machine window property.

Ignore-this: d71d82bac7cc59ef462e728adaf5db01

This patch adds WM_CLIENT_MACHINE property to window properties.
I can be used to distinguish windows run from different machines.

darcs-hash:20090715105053-69f16-6c1398ca86453bcb79aedf33597f5cb279f902a2

jthornber/XMonadContrib,jthornber/XMonadContrib