NumPy style docstrings

[maedoc]

As a project in the scientific community, docstrings are expected to be in NumPy format. PyCharm defaults to :param: style, but it will do NumPy for you, just take a look in the right place:

• File | Settings | Tools | Python Integrated Tools for Windows and Linux
• PyCharm | Preferences | Tools | Python Integrated Tools for OS X

and change "Docstring Format" to "NumPy". If it's not present, upgrade PyCharm.

This task is to rewrite the existing ones and add a pre-commit check.

[maedoc]

also for pre-commit checks

• [ ] autopep8 (find tvb -name '*.py' -exec autopep8 --in-place '{}' \;)
• [ ] flake8
• [ ] mypy