Let each screen get width and height in as a parameter on draw() instead of hardcodin...

This is quite ugly at places, but it seems to work well. This isn't really done for the speed
boost (although fades etc. are quite a lot smoother when the split screen can do all its work
in the native resolution instead of fading and _then_ downscaling), but primarily for the
legibility (ie. let FreeType _understand_ that we are on a smaller screen, so get hinting etc.
right), which seems to have improved by quite a lot (the overall "polish" look is a bit down,
though, probably the autohinter is evil).

19:30-04:00