fix for Circles are mis handled for contouring http://code.google.com/p/heekscad/issues/detail?id=118
fix for Circles are mis handled for contouring
http://code.google.com/p/heekscad/issues/detail?id=118
satovey/heekscnc,asmuelle/heekscnc,jihyun-kim/heekscnc,asmuelle/heekscnc,satovey/heekscnc,jihyun-kim/heekscnc,asmuelle/heekscnc,asmuelle/heekscnc,satovey/heekscnc,satovey/heekscnc,jihyun-kim/heekscnc,jihyun-kim/heekscnc