title: Can't get EXIF info using loadImage.parseMetaData
body: <p>I am using JavaScript LoadImage.parseMetaData (<a href="https://github.com/blueimp/JavaScript-Load-Image" rel="noreferrer">https://github.com/blueimp/JavaScript-Load-Image</a>) to try and get Orientation of an image on the web, so I can rotate it. </p>
  
  <p>If I hardcode the orientation (see "orientation: 3" in my second loadImage call), I can rotate it... but I am trying to use loadImage.parseMetaData to get the Orientation. </p>
  
  <p>I have used web based EXIF parsers and the orientation info is there in the image.</p>
  
  <p>When I call loadImage.parseMetaData  "data.exif" seems to be null. See this fiddle: <a href="http://jsfiddle.net/aginsburg/GgrTM/13/" rel="noreferrer">http://jsfiddle.net/aginsburg/GgrTM/13/</a></p>
  
  <pre><code>var xhr = new XMLHttpRequest();
  xhr.open('GET', 'http://www.filepicker.io/api/file/U0D9Nb9gThy0fFbkrLJP', true);
  xhr.responseType = 'blob';
  
  xhr.onload = function(e) {
      if (this.status == 200) {
          // Note: .response instead of .responseText
          console.log ("got image");
          var blob = new Blob([this.response], {type: 'image/png'});
          console.log("about to parse blob:" + _.pairs(this.response));
          loadImage.parseMetaData(blob, function (data) {
              console.log("EXIF:" + _.pairs(data))
              var ori ="initial";
              if (data.exif) {
                  ori = data.exif.get('Orientation');
              }
              console.log("ori is:" + ori);
          });
  
           var loadingImage = loadImage(
              blob,
              function (img) {
                  console.log("in loadingImage");
                  document.body.appendChild(img);
              },
              {maxWidth: 600,
               orientation: 3, 
               canvas: true,
               crossOrigin:'anonymous'
              }
          );
          if (!loadingImage) {
              // Alternative code ...
          }
  
      }
  };
  xhr.send();
  </code></pre>
  
  <p>Any ideas or alternative approaches to correctly orientating images welcome.</p>