Add Tiling mode

[benneti]

It would be awesome if it would be possible to activate a Tiling mode, to get a bit of default tiling. E.g. open first application tile to fullscreen, add a second one tile first to the left and second one to the right, add a third one tile second to upper right and third to lower right. I know shellshape does this, but it always crashes for me and it would be awesome to have it with your tiling implementation.

Thanks :)

[fbob]

+1 ! :)