code: function( shot, callback ) {
  
          var scope = this;
  
          scope.getShotBuffer( shot, function( err, data ) {
  
              if( err ) {
  
                  callback( err );
  
                  return;
  
              }
  
              var base64 = scope.getBase64FromBuffer( data );
  
              callback( null, base64 );
  
          });
  
      }
docs: Get shot base64 as image
  if passed Number will return a base 64 in the callback
  
  @method getBase64
  
  @param {Number|FS.readFile} shot To be converted
  @param {Function( Error|null, Mixed )} callback Returns base64 string
  
  @return {String} Dont use