Merge pull request #383 from benjaminjackman/patch-2

Set img.crossOrigin to Anonymous in Konva.Image.fromURL  to prevent tainted canvas

src/shapes/Image.js

@@ -239,6 +239,7 @@
       });
       callback(image);
     };
+    img.crossOrigin = 'Anonymous';
     img.src = url;
   };
 })();