Re-do some .h files to limit exposure of internal values, .h files, and dependencies on config.h; return to a simple, concrete boolean type
Re-do some .h files to limit exposure of internal values, .h files,
and dependencies on config.h; return to a simple, concrete boolean type

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