[Cin]ChromaKey(Avid) on manual

I discovered that in the description of the ChromaKey (Avid) plugin in the manual, I left in some lines that refer to the ChromaKey (HSV) plugin. This mistake of mine makes the description confusing and makes it difficult to understand how the plugin works. I have removed the incorrect sentences and made a few minor adjustments. I apologize for the error and for discovering it so late. Here is the link to download the corrected LaTeX file. https://limewire.com/d/MiMBE#nAmC98NvCL