ProPainter Vapoursynth filter

[Dan64]

Using length=200 (the clip has 191 frames) and f16, I was able to get a speed of 1.60fps better than my tests using the python script.

I already fixed the shift color (It was due to a conversion from BGR to RGB, not necessary since the final frames are already in RGB).

I will introduce the parameter frame width/height because the speed will decrease with the frame size and review the mask(s) management.

Dan