[xmonad] qtile like stack layout

[wagnerdm at seas.upenn.edu]

Quoting joe skinner <crypt17 at gmail.com>:

> This works by having two stacks of windows that take 1/2 the screen each and
> can either show one the current window or all the windows in the current
> stack.

This sounds very similar to wmii's layout. Accordingly, have you  
checked out XMonad.Layout.Groups.Wmii, available in darcs  
xmonad-contrib?

~d