v0.10.0

Note: This release is backwards-incompatible, and given that we don't have migrations yet, you'll have to drop and recreate the DB. So please be careful when upgrading.

Notable changes:

• Migrated the documentation from one massive README file to sphinx.
• Test coverage improved.
• Added needs_convertion attribute.
• Introduced token-based authentication.
• Introduced users.
• Switched from numeric, incremental IDs to UUIDs.
• Introduced playlists.
• The track attribute on Tracks, which points to a file, is read-only.
• Shiva won't start without a SECRET_KEY.
• Introduced POST and PUT methods.
• Renamed Track.number to Track.ordinal.
• And many important bugfixes.

For more info read the commit log.