title: html2canvas not rendering CDN images
body: <p>I'm trying to get screenshot using html2canvas. It's working fine for text but it is not rendering CDN images, if i host the images in server it was working fine but if trying to load images from CDN links those image were not rendering.</p>
  
  <p>My code is:</p>
  
  <p>index.php</p>
  
  <pre><code>&lt;div id="target"&gt;
       &lt;img id="editor_Img_1" src="http://d2j259rizy5u5h.cloudfront.net/outputvideos/thumbs/email_44_2015_03_02_54f462457526c-00001.png" alt="event-video" style="height: 200px; width: 320px;"&gt;
  &lt;/div&gt;
  
  function capture() {
      $('#target').html2canvas({
          onrendered: function (canvas) {
              var img = canvas.toDataURL();
              console.log(img);
              $('&lt;img&gt;',{src:img}).appendTo($('img'));
              //Set hidden field's value to image data (base-64 string)
              $('#img_val').val(canvas.toDataURL("image/png"));
              //Submit the form manually
              document.getElementById("myForm").submit();
          }
      });
  }
  </code></pre>
  
  <p>Save.php</p>
  
  <pre><code>&lt;?php
      //Get the base-64 string from data
      $filteredData=substr($_POST['img_val'], strpos($_POST['img_val'], ",")+1);
  
      //Decode the string
      $unencodedData=base64_decode($filteredData);
  
      echo $filteredData;
  
      //Save the image
      file_put_contents('img.png', $unencodedData);
  ?&gt;
  &lt;h2&gt;Save the image and show to user&lt;/h2&gt;
  &lt;table&gt;
  &lt;tr&gt;
      &lt;td&gt;
          &lt;a href="img.png" target="blank"&gt;
              Click Here to See The Image Saved to Server&lt;/a&gt;
      &lt;/td&gt;
      &lt;td align="right"&gt;
          &lt;a href="index.php"&gt;
              Click Here to Go Back&lt;/a&gt;
      &lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
      &lt;td colspan="2"&gt;
          &lt;br /&gt;
          &lt;br /&gt;
          &lt;span&gt;
              Here is Client-sided image:
          &lt;/span&gt;
          &lt;br /&gt;
          &lt;?php
              //Show the image
              echo '&lt;img src="'.$_POST['img_val'].'" /&gt;';
          ?&gt;
       &lt;/td&gt;
  &lt;/tr&gt;
  &lt;/table&gt;
  </code></pre>