Deoldify Vapoursynth filter

[Dan64]

Hello Selur,
  
    I added some changes to B&W methods (method 5 and new method 6) as shown below

:param BlackWhiteMode:      Method used by BlackWhiteTune to perform colors adjustments.
                                Allowed values are:
                                      0 : Apply Contrast Limited Adaptive Histogram Equalization on Luma (default)
                                      1 : Apply Simple Histogram Equalization on all RGB channels
                                      2 : Apply CLAHE on all RGB channels
                                      3 : method=0 and method=1 are merged
                                      4 : Automatic brightness and contrast optimization with ScaleAbs
                                      5 : Multi-Scale Retinex (HAVC)   <-- "on Luma" replaced by "(HAVC)"
                                      6 : Multi-Scale Retinex (B&W)    <-- new method #6

 I hope that you can release an updated test version.

Thanks,
Dan