[Gzz] 28th (Benja)

[Benja Fallenstein]

- Implement marking.
- Implement xu linking bindings.
- Try to fix text, is half-way through.

The new scheme for passing around coordsys is apparently so complicated 
that nobody really understands it, and lots of bugs arise. We NEED to 
think of something simpler... I think the following would be *very good* 
at this point:

- Make (0,0) the upper left corner in all coordsys.
- Always pass w and h everywhere where it's needed explicitly, even down 
to the level of vobs.

That means that all vobs need to be changed not to assume implicit w and 
h through their coordsys, but I think that's ok. It would make things a 
little less convenient for symmetrical things like rectangular 
backgrounds, but not terribly-- 0/0.5/1 instead of -1/0/1 is not so 
terribly hard to understand and compute. But it would make A LOT of 
things much more sane.

Does that sound ok?

- Benja