Boule v0.6.0: Reference ellipsoids for geodesy and geophysics

Boule is Python library for representing reference ellipsoids, calculating their gravity fields, and performing some global coordinate conversions. "Boule" is also French for "ball" as well as a traditional shape of bread resembling a squashed ball. Documentation: https://www.fatiando.org/boule Source code: https://github.com/fatiando/boule Part of the Fatiando a Terra project. Note: Authors are listed in alphabetical order by last name.