still is mirror transform. This commits adds the remaining operators:
* UV mapping operators (U key menu): cube, sphere, cylinder, etc.
* Hide/Show operators.
And solves most XXX's, including:
* Fix bad includes and calls into space image.
* Aspect ratio correction.
* Create UVs if they don't exist yet on unwrap.
* Assign image to UVs.
* Drawing proportional edit circle.