Per-Face UV-mapping editing

[Kruzschev]

would it be possible in any way that you can directly edit the faces UV-map in means of rotation/scaling aswell applying texture it with the additional options that you can merge all those textures in a selected picture kind of like Atlas style?

Maybe aswell the option that the UV-map movement is locked per pixel basis so maybe that might help that in the edge of the UV-map faces renders only pixels of the inside but not outside,
basically like this

http://youtu.be/SE3I9zsTkQE?t=1m29s

If this method is way too hard to code/complex then it's fine by me.
I was just wondering if this feature would be possible