Added Afro

I've added my [Afro](https://github.com/jbrooksuk/Afro) framework, however I advise to leave this PR until Afro meets the guidelines.

There are issues that I've just created to meet the contributing guidelines:

- PSR Compliant
- Composer installable
- Test suits

I'll let you know when it's properly ready, unless you have no qualms in adding it now.