modify dot2gxl etc for new .gv file format. 	- commands now: gv2gxl, and gxl2gv 	(softlinks provided for dot2gxl, and gxl2dot) 	- recognizes ".gv" extension as well as ".dot" for backward compat.
modify dot2gxl etc for new .gv file format.
	- commands now: gv2gxl, and gxl2gv
	(softlinks provided for dot2gxl, and gxl2dot)
	- recognizes ".gv" extension as well as ".dot" for backward compat.

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