[dwm] dwm with nicer bar

Hi,
i tried dwm for the first time a few days ago, after years of using
wmii. my impression was, that it is much more simpler than wmii. but
something i missed where clickable buttons in the status bar, and so i
started to play a little bit with the code.

The result is an statusbar, where the stdin is splitted by "|" to
several buttons, for each button actions can be defined.

It looks like this:
http://img161.imageshack.us/img161/115/200703042014361024x768ssk9.png

i attached an diff of the actual mercurial version

didi