Use Django models to store state
Created by: SunilMohanAdapa
- Remove dependency on withsqlite and use Django models. This avoids depending on a module that is not available in PyPi. Withsqlite does not have Python3 support. It does not work when we choose a different database backend. Atleast partly duplicates what Django models are meant for.
- Check and update database schema on every run so that newly added modules can add tables and old ones can update.
@NickDaly, @jvalleroy, @petterreinholdtsen, @fonfon, Please review the merge request if any of you find time.