Add zenodo DOI badge.
:target: https://github.com/riga/law/blob/master/LICENSE
:alt: License
+.. image:: https://zenodo.org/badge/75482295.svg
+ :target: https://zenodo.org/badge/latestdoi/75482295
+ :alt: DOI
+
**Note**: This project is currently under development. Version 0.1.0 will be the first, fully documented beta release, targetted for early 2020.
