Optimized AlphaTrimmedMeanFilter by using memoized components
Removed a WriteLine statement from the Initiator class
Memoized values for color conversion and desaturation

I realized that a considerable amount of time was being wasted recomputing the
same values over and over again during desaturation. I also realized that I was
really only creating the same 256 greyscale colors over and over again. I
memoized the values to save time
Implemented crash protection from faulty plugins.
Fixed a compilation error in MainForm.cs