Add a CONTRIBUTING.md

[landonreed]

Issue by maukoquiroga
Friday Jan 12, 2018 at 20:51 GMT
Originally opened as catalogueglobal#69

---

Problem

There's no explicit contribution process, making it harder for contributors to propose fixes, and making the overall contributing experience rather confusing.

See catalogueglobal/pull/68

Possible solution

It would be superb if could explain the expected contribution mechanism in a CONTRIBUTING.md file at the root of this repository.

See for example https://github.com/openfisca/openfisca-core/blob/master/CONTRIBUTING.md