Rolch

- Added Gamma Distribution
- Improvements in the testing infrastructure
- Better handling of default values
- Some bugfixes

Some bugfixes

- Improve / fix online model selection based on information criteria BerriJ

- Fix the model selection for LASSO
- Fix the weighted RSS calculation and updating
- Higher setuptools versions

Minor release with major improvement in usability and documentation.

We have added _a lot_ of docstrings and set up the first version of the [documentation](https://simon-hirsch.github.io/rolch/).

No other changes in functionality.

A small step for the world, but a big step for `ROLCH`. Find the package on [pypi](https://pypi.org/project/rolch/).