added missing *.png directory
added missing *.png directory

jihyun-kim/heekscnc,asmuelle/heekscnc,satovey/heekscnc,asmuelle/heekscnc,asmuelle/heekscnc,jihyun-kim/heekscnc,jihyun-kim/heekscnc,satovey/heekscnc,jihyun-kim/heekscnc,asmuelle/heekscnc,satovey/heekscnc,satovey/heekscnc