update readme
update readme

duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery,duchangyu/ng-gallery