code: function mxPolyline(points, stroke, strokewidth)
  {
  	mxShape.call(this);
  	this.points = points;
  	this.stroke = stroke;
  	this.strokewidth = (strokewidth != null) ? strokewidth : 1;
  }
docs: Copyright (c) 2006-2015, JGraph Ltd
  Copyright (c) 2006-2015, Gaudenz Alder
   
  Class: mxPolyline
  
  Extends <mxShape> to implement a polyline (a line with multiple points).
  This shape is registered under <mxConstants.SHAPE_POLYLINE> in
  <mxCellRenderer>.
  
  Constructor: mxPolyline
  
  Constructs a new polyline shape.
  
  Parameters:
  
  points - Array of <mxPoints> that define the points. This is stored in
  <mxShape.points>.
  stroke - String that defines the stroke color. Default is 'black'. This is
  stored in <stroke>.
  strokewidth - Optional integer that defines the stroke width. Default is
  1. This is stored in <strokewidth>.