fun = function () {
            self.addDataFromFile(filePath);
            self._asyncRefCount--;
            self._asyncCallBack(selector,target, (self._asyncRefTotalCount - self._asyncRefCount) / self._asyncRefTotalCount);
        }
Adds data from file with Async.
@param {String} imagePath
@param {String} plistPath
@param {String} filePath
@param {function} selector
@param {Object} [target]