title: How to add image to fabric canvas?
body: <p>I want to add images/icons to my fabric canvas. The code given on the Fabric demo is not working. </p>
  
  <pre><code>fabric.Image.fromURL('my_image.png', function(oImg) {
  canvas.add(oImg);
  });
  </code></pre>
  
  <p>This just makes my entire canvas blank.
  I want to add icons as clickable elements which respond to events.</p>