Found out how to save alpha channel to PNGs from gd. Improves -Tpng:cairo:gd  when using transparent backgrounds 	(not that anyone should care.  Just use the default -Tpng:cairo:cairo )
Found out how to save alpha channel to PNGs from gd.
Improves -Tpng:cairo:gd  when using transparent backgrounds
	(not that anyone should care.  Just use the default -Tpng:cairo:cairo )

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