Deoldify Vapoursynth filter

[Dan64]

It was not my intention to remove the DeOldify only version.

then how about:
0: no merge
1: Simple Merge
2: ...

I prefer this solution. But please wait, before implement this list, that I have time to release a new version, consider that the AdapativeMerge will require 2 additional parameters: the scale_factor (in the code was = 1.2) and the min_weight (in the code was 0.15).