add more directionality to turtle shape; fix stroke-width bug
add more directionality to turtle shape; fix stroke-width bug

walterbender/turtleconfusion,walterbender/turtleart,walterbender/turtleartmini,AlanJAS/turtleart,walterbender/turtle3D,walterbender/turtleflags,walterbender/AmazonasTortuga