title: Event handling for PanZoom.js not firing
body: <p>Using PanZoom JS, I am trying to handle a simple click event for any SVG that was clicked. According to docs, it should be as simple as this:</p>
  
  <pre><code>$panzoom.on('panzoomend', function(e, panzoom, matrix, changed) {
      if (changed) {
          // deal with drags or touch moves
      } else {
          // deal with clicks or taps
      }
  });
  </code></pre>
  
  <p>This never fires and it never hits the if test.</p>