Turned renderThumbnail into re-usable macro
Added notifications API
Removed notification templates
Merge branch 'newframework' into notifications
Some Admin UI CSS clean-up
Renamed oae.api.util.showNotification to oae.api.util.notification
Merge branch 'newframework' into renderThumbnail

Conflicts:
	ui/macros/list.html
Merge branch 'newframework' into notifications
Merge pull request #2665 from nicolaasmatthijs/renderThumbnail

Re-usable renderThumbnail macro
Merge pull request #2667 from nicolaasmatthijs/notifications

Notifications API
Follow up on pull/2634
Follow up on pull/2634