- Add a custom limiter and use it for limiting users' download instead of using database
> So add a requirement `limits`.
- Fix a character's value
- Change the email max length to 64
- Change something about API's roles and powers
- Add an API endpoint for getting users' roles and powers
- Add song names for getting the score list (For API)
- Try to ensure thread safety in Link Play (twice again)
- Small change about database timeout
- Have a try to use `nginx` and `gevent` (Yes. I ensure it works well. This will not be viewed as a formal and necessary update.)
- Add two indices for avoiding possible slow queries
> This is an experimental handle for the database which has some tables over one hundred thousand lines.
- Add Course Mode
- Add support for downloading additional files
- Add support for `skill_fatalis` (Hikari booms your world.)
- Delete my hair X<
> WHERE IS MY TAIRITSU ?!
> Some other things are not supported now, such as... the feature which is one line above.
- Code refactoring
- Fix a bug that the other player will not become the host of the room at once, when the player disconnect in link play.
> Maybe add many unknown bugs. XD
> The song database `arcsong.db` will not used in the future. You can use a tool in `tool` folder to import old data.
