show verbose error if metadata fetch does not work correctly Benjamin…

…Brandmeier#33

update readme

remove all generated js files

Update README.md

add web animations polyfill. BenjaminBrandmeier#15

update readme

update readme to 0.4.0

Merge branch 'master' of https://github.com/BenjaminBrandmeier/ng2img…

…gallery

Conflicts:
	README.md

refactor(mobile): improved responsiveness for mobile devices

chore(0.2.1): changed link to updated version