2bwm + cwm

Hi xtraemo,
Two new WMs in our repo. About 2bwm, it was a bit tricky. I added <code>sed -i '/#include <stdlib.h>/i#define _GNU_SOURCE' 2bwm.c</code> because it removes a warning <code>warning: implicit declaration of function `asprintf'</code>.
I didn't use the provided Makefile (because it fails).
Cross-builds are OK.
Cheers.