Created by: vicdoval
_Color_in and color_out implemented in numpy.
_fixed a bug inf the hsl mode
_Color out now has also HSV and HSL 
Put an x letter in each brackets when you're done this item:
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Code changes complete. -
Code documentation complete. -
Documentation for users complete (or not required, if user never sees these changes). -
Manual testing done. -
Unit-tests implemented. -
Ready for merge.