tweak backend views with badges + main asset
add basic navigation + frontend functionality
set up reference tiles with main asset and infos
add styling for index tiles
add isotope for reference grid + fixes
add pseudo validation on main asset when activating a reference
disable activate button if no asset is present
add final sc-circles (kringel)
minor cleanup
Merge pull request #5 from donaier/features/frontend_index

Features/frontend index