Added XYZ functionality and tested with lower color bound of white and upper of red.
Added YCbCr functionality - input range is same as RGB (packed integer 0x000000 to 0xffffff) and output is RGB.  Found a transform that makes it easier than having [0,1] range for YCbCr and Dr. Candan said it is ok to have any range for input
removed extraneous files
Merge pull request #1 from awesymptote/master

Added XYZ functionality and tested with lower color bound of white and u...