Finish clean between two conflicting versions of DotIO.c, principally removing last remnants of old libgraph usage.
Finish clean between two conflicting versions of DotIO.c, principally
removing last remnants of old libgraph usage.

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