* Add pre-commit configuration
Add auto-formatting configuration using the https://pre-commit.com/ project.
Having auto-formatting setup and automatically enforced helps speeding up
development and review process.
* Apply the auto-formatting on all files in the repository
* Removes flake8-quotes as it conflicts with Black formatting
* Disable some Flake8 rules
Disable Flake8 rules that are handled by Black. The list comes from
https://github.com/ambv/black/issues/429#issuecomment-472687803.
Boris Feld