This release adds:
- Caching of library data
- Caching of low resolution cover art
- A refresh button that updates the above as per issue #20
- A logout button to clear the cache without updating it
- More sensible choice of cover art resolutions (the closest to 300x300 is chosen as per 7d78658)
- A change of the theme switch touch target so it's a bit larger (676e3ca)
...and a few dependency updates I guess.