This version incorporates tristan0x 's pull requests.
There is a new option `--black-option` for passing options to `black`. For example, if you want to pass `-S` and `-N` to `black`, then you can:
clean_ipynb --black-option -S --black-option -N lonzo_ball.ipynb
Also thanks to tristan0x , `setup.py` includes more complete dependency list.
Finally, I've improved the changes and updated the read me accordingly.