- Add an API endpoint for getting the user's rating records.
- more detailed INFO messages for login and register
- Add `finale/finale_end` endpoint #110
- Fix a bug that `GET` requests without data will report an error in API
- Fix a bug that `aggregate` requests will get an error when the inner function raises an error
- Fix a bug that the charts of a course cannot be the same because of the incorrect primary keys
- Fix a bug that global ranking scores cannot be calculated if there are no chart in the database #61
- The first try to fix#60 (I don't think it can be done so easily.)