Fixed: "onWhenAddingFileFailed is marked private but documented in API as public" (#454)

Author: nervgh

src/module.js

@@ -245,7 +245,6 @@ angular
              * @param {File|Object} item
              * @param {Object} filter
              * @param {Object} options
-             * @private
              */
             FileUploader.prototype.onWhenAddingFileFailed = function(item, filter, options) {};
             /**