update gitignore
update gitignore

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