* Fix readme and add license file.
* Add flake8 to tox, update GH actions.
* Fix tox invocation.
* Fix apt in CI.
* Add tox and fix types.
* Update gitignore.
* Add mypy settings.
* Remove stalebot.
* Fix readme badge.
* Fix changelog.
* Fix setup script.
* Update README.
* Add github workflows.
* Add note on old executable in readme.