Write A good How to Contribute file

[felquis]

To help introduce new developers to this project.

1. How the files are distributed and loaded.
2. How to test the style guide
3. How to run this project in the browser

Also

1. Git workflow,
2. fork..
3. create branch..
4. edit files...
5. commit them...
6. push the branch...
7. propose pull request...
8. Describe your changes, positive points, what is fixed
9. Describe how to test your changes

A CONTRIBUTING.md file would be great :)