added color_palette.c which contains additional colors from ColorBrewer. Changed color_palette.h so that palettes are now external and defined in color_palette.c
added color_palette.c which contains additional colors from ColorBrewer. Changed color_palette.h so that palettes are now external and defined in color_palette.c

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