Deoldify Vapoursynth filter

[Dan64]

In the last version I shortened the names of dd_tweak_bright, dd_tweak_cont, dd_tweak_gamma in dd_bright, dd_cont, dd_gamma.
I decided to revert the changes, so I attached a new updated with the names equals to the ones implemented in Hybrid.

I checked all the parameters in the GUI. It is only missing a new boolean parameter "dd_method_params[4]" called "invert_clips" if true is inverted the clip order in all the Merge methods (i.e. clipa-> clipb and clipb->clipa). 

Dan

P.S.
here you can find a comparison of LumaMerge using a gradient mask (0.4,0.7)
https://imgsli.com/MjQ3NjIy