Drawing and Filling Polygons

• pxl-prim-poly-draw_polygon: draw_polygon/[2,3]
• pxl-prim-poly-draw_polygon_relative: draw_polygon_relative/[2,3]
• pxl-prim-poly-fill_polygon: fill_polygon/[3,4]
• pxl-prim-poly-fill_polygon_relative: fill_polygon_relative/[3,4]