[Gzz] PP conclusion

[Matti Katila]

PP demo.

One day(and one night ;) left. I'll rework the left-panel geometry 
tomorrow. I though it would be very good to show bigger example of pp but 
I'm not very sure about it anymore. At least I have no glue what would be 
the best example to show.

There still are two big UI bugs to be smashed:
   -1-n problem. One paper is ok and the rest are shifted for some reason. 
    Might be a matching problem like nadir was or wrong cs?

   -Interpolation problem. I noticed it works better in upper-left corner 
    and problem is repeated when coming down the shortcuts. I hope this 
    helps. Also 1-n problem is ok when interpolating and then with final 
    render (n-1) paper get shifted paranormally.

    I tried to make simple modification to keymap-test -demo so you could 
    fix this. I'm not very sure if it helps or not.


   -Matti