Deoldify Vapoursynth filter

[Dan64]

Sometime I forgot that python is not a true language.

I spent 3 hours to understand that ColorMNet was broken because I called a constant ColorMNet and python was calling the constant instead to call the function, obviously without issue any message that made sense. Also the debugger was unable to recognize that was called a constant instead of a function. It simple refuse to step-in, even in this case without issue any message that made sense.

Attached the new RC4.

Removed:

havc_constants.py
havc_filters.py

Added:

havc_utils.py
vsslib\constants.py

Removed all the parameters constants.

Included new sample test, with the parameters constants removed.  

Sorry for the inconvenience, I had to rollback a lot of code before find the reason of ColorMNet failure.

Dan