New screenshot, DirectFB

We are now nearing the first milestone. The last widgets are being patched up by M. Karg, while I am working on code which allows easy customizing of the look of Wsl applications.

Also, I have started DirectFB 1.3 bindings. Since the performance of SDL is suboptimal in certain parts, we want to have an (exclusive or optional) DirectFB backend soon. The header files are quite large, though. Might take time.

Cheers, R. Schäfer