Initial attempt at a CONTRIBUTING.md
Add an initial AUTHORS file
Some rework markup and branch-fu
No need to keep your own master up to date now
Minor tweaks

Plus, that thing where I teach @chilts how to properly count to 5.
Add more words in README => CONTRIBUTING link
Add emails to the AUTHORS list
Using better URLs

No need to fully qualify the URLs, my bad.
Merge pull request #719 from mozilla/contributing

Contributing