Better control over GridVariants geometry
Better control over GridVariants geometry

Ignore-this: 59da789a28f702595159eeb6ddd30fd9

Added new messages the layout understands to allow changing the grid aspect
ratio and setting the fraction of the master to a given value rather than
changing it relative to the current value.

darcs-hash:20110907133304-c6b6b-92310c19366e2dda92e3cdc5880d2f6208cdf833

kmels/xmonad-launcher,kmels/xmonad-launcher