Enhance error reporting.
Don't send tracks which aren't available in your country.
Merge branch 'master' of https://github.com/bnjbvr/minstrel
Use directly keys rather than a key() function.
Prefer cached tracks even when connectivity is on.
Use [].map
When offline, only show cached playlists and tracks.
Propose to sync playlists only when online.
Better handle sync.
Listen to online/offline events to update the list of available tracks.
Add storage permissions for unlimited indexeddb.