Allow auto-coloring of polygon plot edge_colors and face_colors.
Allow auto-coloring of polygon plot edge_colors and face_colors.

burnpanck/chaco,ContinuumIO/chaco,ContinuumIO/chaco,burnpanck/chaco,ContinuumIO/chaco,ContinuumIO/chaco,burnpanck/chaco,tommy-u/chaco,tommy-u/chaco,tommy-u/chaco