v0.1.0-alpha.4

#Major Alpha update:

1. Keyboard shortcuts(consult usage for more details)
2. Changed ui and some animations for speed improvements
3. Changed database store to sled and reduced batch size from all songs to a set size for large amounts of songs
4. Introduced concurrency with the rayon crate for processing images(decoding, encoding)
5. Bug fixes and addition and completion of some features
6. Added more accurate searching for songs, albums, genres, artists and playlists

Full Changelog: v0.1.0-alpha.3...v0.1.0-alpha.4