added SVGPathSeg polyfill, closes #196

Author: liabru

demo/index.html

@@ -12,7 +12,10 @@
         <!-- only required if using Matter.RenderPixi -->
         <script type="text/javascript" src="./js/lib/pixi.js"></script>
 
-        <!-- matter lib edge master version -->
+        <!-- only required if using Matter.Svg -->
+        <script type="text/javascript" src="./js/lib/pathseg.js"></script>
+
+        <!-- matterjs dev version -->
         <script type="text/javascript" src="../build/matter-dev.js"></script>
 
         <!-- only required if using MatterTools -->