Nndownload

- Write tags in metadata as UTF-8 without casting
- Read session cookie from file (`--session-cookie` will check for a TXT filepath at the provided argument before using it as the string cookie value)
- Modified comments extension to `.comments.json`
- Small bug and maintenance fixes

- Update comments API for videos
- Improve handling of exceptions

- Add support for downloading video series
- Use LF endings on PyPi upload

- Nico's login auth flow has changed, requiring the use of OTP codes in what seems to be most cases. Session cookies (`--session-cookie`) continue to work without requiring this step. A future release will provide a more stable way of storing your session cookie

- Better checks for media availability when downloading videos
- Fixed mylist downloading
- Fixed creation of non-stripped filenames
- Various code cleanup

- Specify index to start list downloads on with `--playlist-start`, e.g. `--playlist-start 39`
- Login using a session cookie value with `--session-cookie`
- Support for downloading Seiga user manga
- Removed `--html5` as all videos are now served on the HTML5 player
- Various bug fixes
- Always download highest thumbnail quality available
- API changes