Adding ColorSpace color conversions, adapting from bsd licensed file of Pascal Getreuer originally
Debugging of HexColorAttributeRGB()
Adding fill_faux_transparent()
Large reworking of ColorBase to make it easier to, in the future, provide sliders for cielab, xyz. Also HSL is default now, rather than HSV, but HSV is still available. Internally, channels stored as double for adaptibility.
fix change from ColorBox