v0.1.6

Changelog

• Switched to maturin as a build and packaging system.
• Updated Rust code and dependencies to 2021 edition.
  • source package can now be compiled with stable Rust as opposed to nightly.
• Dropped Python 2 support.
• Switched to Github actions for CI and publishing to Pypi.
• Added project documentation generated with pdoc.
  • publish master branch docs automatically to Github Pages.
• Raise an exception if provided with an empty csv file.
• Updated README to clarify relationship to other projects.

Full Changelog: v0.1.3...v0.1.6