Deoldify Vapoursynth filter

[Dan64]

Hello Selur,

  I released the new version RC22.

  In this version, the speed GUI "Preset" (fast, medium, slow) will apply also to ColorMNet.
  Also the GUI parameters "Ref merge", "Weight", "Threshold" are now applicable to ColorMNet.

  In order to allow SCDetect() to perform better on blend scenes I introduced a new boolean parameter "sc_normalize" in HAVC_ddeoldify() and "ScNormalize" in HAVC_main().
  If this flag is enabled, the B&W frames used by misc.SCDetect() will be "normalized", in this way the SCDetect() filter will be more sensible and will be able to detect more blend scenes.

  I hope that you can include it in the GUI.

Thanks,
Dan