simple loading animation and fade in and out animations

rollup.config.js

src/app/+collection-page/collection-page.component.html

src/app/+collection-page/collection-page.component.ts

src/app/+community-page/community-page.component.html

src/app/+community-page/community-page.component.ts

...on-list/community-page-sub-collection-list.component.html

...tion-list/community-page-sub-collection-list.component.ts

...el-community-list/top-level-community-list.component.html

...evel-community-list/top-level-community-list.component.ts

src/app/+item-page/full/full-item-page.component.html

src/app/+item-page/full/full-item-page.component.ts

src/app/+item-page/simple/item-page.component.html

src/app/+item-page/simple/item-page.component.ts

src/app/+search-page/search-page.component.html

src/app/+search-page/search-page.component.ts

...+search-page/search-results/search-results.component.html

src/app/app.component.html

src/app/browser-app.module.ts

src/app/object-list/object-list.component.html

src/app/server-app.module.ts