0.2.0

Added

• Added added and removed classes for when adding and removing songs from liked songs.

Changed

• Fixed hardcoded location for rspotify cache.
• Changed naming from saved to liked to avoid confusion with the fact that something can be saved/added to your liked songs. Liked songs is not what the API uses, but it's what the GUI uses. This is reflected in both the code, the now toggle-liked command, and class output.