message: polyline tweaks to work with AutoCAD
diff: @@ -337,9 +337,7 @@ namespace MakerJs.exporter {
  "10",
  vertex.x,
  "20",
  - vertex.y,
  - "30",
  - 0
  + vertex.y
  );
  if (vertex.bulge !== undefined) {
  @@ -351,12 +349,8 @@ namespace MakerJs.exporter {
  append("0", "POLYLINE",
  "8",
  polyline.layer,
  - "10",
  - 0,
  - "20",
  - 0,
  - "30",
  - 0,
  + "66",
  + 1,
  "70",
  polyline.shape ? 1 : 0
  );
  