Mokkari

Changes since last release:
- Fixed name of session.py
- Modified some test to mock requests.

Changes since last release:
- Add support to use a sqlite cache of API requests.
- Initial work on documentation which can be found at: https://mokkari.readthedocs.io/en/latest/
- Fixed Issue schema for store_date being 'None'.

Changes since last release:
- None. Released to hopefully fix the pypi github action.

Initial release.