title: save div as png - html2canvas - blurry quality
body: <p>Using html2canvas i'm trying to capture a div and save it as a .png file, and it works!</p>
  
  <p><em>(just using window.open in example to simplify it - same quality problem)</em></p>
  
  <p>However the image sharpness / quality of the images inside the targeted div is pretty bad. I'm not quite sure how to improve the image quality/sharpness. Any suggestions ?</p>
  
  <p><strong>saveAsPNG function:</strong> </p>
  
  <pre><code>saveAsPNG = function(id) {
  var target = document.getElementById(id);
  
    html2canvas(target, {
      onrendered: function(canvas) {
        var data = canvas.toDataURL("image/png", 1);
        window.open(data);     
      }
    });
  };
  </code></pre>