Rename Rails app from BeatStream => Beatstream
Update changelog
Fix indendation in controllers, models and .gitmodules
Remove unused helpers
Add a base controller for API controllers
Routes: Move login/logout routes to the bottom
Fix users fixtures
Remove unusde playlists fixture
Always authorized on test env
Set SONGS_JSON_FILE to a String instead of Pathname
Song: Avoid double MUSIC_PATH declarations
Add tests for /songs and /songs/play API endpoints
Add tests for /songs/now_playing and /songs/scrobble