Renderer and file export changes

SADXLVL2:
- Started writing fixed obj export for basic attach models. UV coords
need to be fixed, everything else is working.

SALVL, SADXLVL2, and SAMDL:
- Using the middle mouse button to rotate the camera view now updates
constantly instead of waiting for another camera move command to update
the view. Combing actions causes some lag and needs to be changed
though.