Changes to ViewerJS:

- <div id = "documentName" style="display:none;"></div>     // hide the document name as it will be visible in the panel title

- this.download = function () {
          var documentUrl = url.split('#')[0];
          documentUrl += '&contentDispositionType=attachment';
          window.open(documentUrl, '_parent');
      };

  (in the compressed version it is: window.open(a+"&contentDispositionType=attachment","_parent"))

  // change the download url... otherwise the file will be shown inline