Re: [Cin] Chromakey improvements checked in to GIT

Thanks again to Andrea. I had to make a single change as my Latex got an error on: ($#ff000000$). I had to remove the 2 $ to solve it.

To add the explanation of the new keys and equalize the presentation to what was done for ChromaKey-HSV, I updated the manual for the ChromaKey plugin. You just need to replace the entry in Latex.