Changes:
- New YT's playback implementation, from Metrolist
- Rework contributors section in About
- Reimplement change thumbnail button for songs and albums
- Reset live wallpaper when song stops (disabled by default)
- New url caching to reduce playback load time

Fixes:
- App randomly starts playing songs in the background
- Low resolution on some thumbnail
- App crashes when shuffle an empty playlist
- App crashes during queue export
- Download button doesn't work in media control
- Error when seek to uncached timestamp
- App crashes randomly in the background