WIP commit for new system to draw widgets and use themes or styles.
Not really interesting stuff to see in code now, the current
structure will change quite a lot, this to make it hook up well
to the existing system.
What works quite well is a new full opengl vector method to draw
scalable and pixel-aligned anti-aliased buttons.
http://download.blender.org/institute/rt3.jpghttp://download.blender.org/institute/rt4.jpg
