Better logging

[loeiten]

The way bout_runners is logging gives the current issues:

• If bout_runners is imported, everything is logged. For example will also the autocomplete of ipython be affected, spewing out logging everytime Tab is hit
• pip imports bout_runners during setup, and when bout_runners/__init__.py is reached, it will call on setup_logger, which uses pyyaml which is on bare systems not present

The current workaround with try import of yaml is a bit hacky. Therefore, a possible workaround could be to use the setup similar to flake8/__init__.py.
If such a solution is chosen configure_bout_runners.py will also have to be refactored