Send search to any backend and not just spotify. Get cover art only
from spotify if the corresponding track is a spotify one.
Add missing spaces to jade files to silence nodejs warnings
Filter duplicate playback ended events which empty the playlist
Check track for being null
Rewrote player to better stay in sync with backend tracklist. Especially it allows to add tracks in the backend too
Do not overwrite the req.user but create a new object instead
Implement bombing
Evit tracks from cache after playback
React (update client) to all tracklist changes. Even when tracks get added directly to the backend
- Fix bug where the playlist does not update when the tracklist advances to the next track
- Repeat the default playlist (in different order) once we reach its bottom
Remove require of default-playlist.js and fixed indentation
Get album art in playlist call instead of add. This makes sure that
also artwork for tracks added by another frontend will have artwork.

Filter tracklist tracks from search results to avoid adding tracks
twice.