- make many small notebooks out of one big one
- introduce folder structure for all chapters
- add a bit more content to Chapter 0
- streamline text in Chapter 0
- adjust table of contents

- jupyterlab => ^3.1
- matplotlib => ^3.4
- numpy => ^1.21
- pandas => ^1.3
- scikit-learn => ^1.0
- various transient dependencies

- add 2020
- rename the LICENSE file into LICENSE.txt

- make it more generic (not cscm in the names)
- update the readme and license files
- use latest releases in pyproject.toml and requirements.txt

Also make the images in the notebook a bit smaller