Added inver haversine functionality to the module

[CrapsJeroen]

Based on open PR #19 and issue #29 I've added the inverse Haversine functionality for angles expressed in a radian angle.
Also added an Enum for the cardinal and intercardinal directions under Direction.

[jdeniau]

Hi !

Thank you for your contribution ! 👍
I will be on holiday for the next month. I will take a closer look at your PR when I come back. It does seems nice and clean, but I will avoid pushing a new release and break haversine 😄

[jdeniau]

For the record, and totally unrelated, the email you commit with seems to be unregistered with your github account (your avatar and your username are not set in your commit, see screenshot).

[CrapsJeroen]

Hi !

Thank you for your contribution ! 👍
I will be on holiday for the next month. I will take a closer look at your PR when I come back. It does seems nice and clean, but I will avoid pushing a new release and break haversine 😄

I completely agree, enjoy your vacation!

For the record, and totally unrelated, the email you commit with seems to be unregistered with your github account (your avatar and your username are not set in your commit, see screenshot).

Thanks for bringing it to my attention. 🙏

[jdeniau]

Thanks @CrapsJeroen !
I will release that with #40 tonight or tomorrow