- add internal support for alpha channel in HSV colors - save both rgba and hsva color values in colortbl.h  - share 'a' value - only "transparent" has an "a" value of 0  - couold be others one day - -Tps generator does binary test on "a" value of color - skip rendering if "transparent"
- add internal support for alpha channel in HSV colors
- save both rgba and hsva color values in colortbl.h  - share 'a' value
- only "transparent" has an "a" value of 0  - couold be others one day
- -Tps generator does binary test on "a" value of color - skip rendering if "transparent"

MjAbuz/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,jho1965us/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,MjAbuz/graphviz,jho1965us/graphviz,pixelglow/graphviz,kbrock/graphviz,ellson/graphviz,tkelman/graphviz,kbrock/graphviz,MjAbuz/graphviz,ellson/graphviz,kbrock/graphviz,BMJHayward/graphviz,ellson/graphviz,jho1965us/graphviz,tkelman/graphviz,ellson/graphviz,ellson/graphviz,BMJHayward/graphviz,jho1965us/graphviz,jho1965us/graphviz,MjAbuz/graphviz,pixelglow/graphviz,kbrock/graphviz,ellson/graphviz,pixelglow/graphviz,BMJHayward/graphviz,jho1965us/graphviz,kbrock/graphviz,BMJHayward/graphviz,tkelman/graphviz,tkelman/graphviz,kbrock/graphviz,pixelglow/graphviz,kbrock/graphviz,MjAbuz/graphviz,kbrock/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,ellson/graphviz,jho1965us/graphviz,MjAbuz/graphviz,pixelglow/graphviz,BMJHayward/graphviz,pixelglow/graphviz,jho1965us/graphviz,BMJHayward/graphviz,ellson/graphviz,ellson/graphviz,jho1965us/graphviz,tkelman/graphviz,tkelman/graphviz,pixelglow/graphviz,MjAbuz/graphviz,tkelman/graphviz,kbrock/graphviz,MjAbuz/graphviz,tkelman/graphviz,ellson/graphviz,pixelglow/graphviz,tkelman/graphviz,MjAbuz/graphviz,pixelglow/graphviz,ellson/graphviz,kbrock/graphviz,pixelglow/graphviz,tkelman/graphviz,kbrock/graphviz,pixelglow/graphviz,jho1965us/graphviz,tkelman/graphviz,jho1965us/graphviz,MjAbuz/graphviz