Brought back the basics for transform manipulators. Martin will
hook it all up to new transform system.
Some notes:
- Still uses G.moving
- BIF_do_manipulator() is called as a View3D Operator
I've tested selecting handles, added a print to confirm
- BIF_GetTransInfo() returns a dummy struct now, just to get
it running.
- Marked some other issues with XXX
f3fd7d8800