Rename zenburn-colors to match upstream
Rename zenburn-colors to match upstream

Change the color names from xyzzy to zenburn-xyzzy to match upstream
names. This will make pulling upstream changes much easier. The new
magit faces being a case in point.

fcassirer/dot.emacs,pkryger/exordium,philippe-grenet/exordium,steve-downey/dot.emacs,dvamin/dot.emacs,jbibollet/exordium,psipika/exordium