message: add pointMatchingDistance to dxf export options
diff: @@ -261,7 +261,7 @@ namespace MakerJs.exporter {
  });
  walkedPaths.push.apply(walkedPaths, loose);
  }
  - model.findChains(modelToExport, cb, { byLayers: true });
  + model.findChains(modelToExport, cb, { byLayers: true, pointMatchingDistance: opts.pointMatchingDistance });
  } else {
  var walkOptions: IWalkOptions = {
  onPath: (walkedPath: IWalkPath) => {
  @@ -315,7 +315,7 @@ namespace MakerJs.exporter {
  /**
  * DXF rendering options.
  */
  - export interface IDXFRenderOptions extends IExportOptions {
  + export interface IDXFRenderOptions extends IExportOptions, IPointMatchOptions {
  /**
  * DXF options per layer.
  