All of the view3d drawing code is now 'Context' free.
The idea is:
- ED_region_do_draw() sets and freezes drawing context
- regiontype draw() callback then can pass on other relevant
context stuff as function args.
Also cleaned up the WM opengl wrappers, to mimic opengl state;
no reason to give window pointer anymore.
Drawing code for space_view3d module.
It's still not cleaned, have to check on context usage still.
Also missing is editmodes, armatures, and probably more.
Known issue: splitting to 2nd window gives bad opengl lighting.
Picture for fun:
http://www.blender.org/bf/rt2.jpg
Current stat: brought back almost 10k lines! :)
