* ignore test*.py files
* format requirements.txt to be more readable
* only show note on home page if it is set
* allow flake8 to check for more than just unused imports
* remove a bunch of unused methods in `compat.RelayDatabase`
* turn `Config` into a dataclass
* replace database config methods with `RelayData` dataclass
* rename `loads` to `cls` in `HttpClient.get`