fix bug #1827:  box used for unknown shape, but doesn't retain fill 		add support for "square" as equiv to: shape=box, regular=true
fix bug #1827:  box used for unknown shape, but doesn't retain fill
		add support for "square" as equiv to: shape=box, regular=true

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