The default is 50, which we hit in a few places already. Let's do 75, equally arbitrary but gives us a bit more wiggle room.
Move the max-line-length setting to the `pycodestyle` section, which is read by pylint but also other tools like autopep8.
Create a setup.cfg file and move the pylint settings from .pylintrc here. This file can be used to configure other tooling as well, so it is in general more useful as a central configuration place.
