Reference some of the current guidelines for CONTRIBUTING on the page that GH intended this to be in

Part of #60
Try full relative path

Part of #60
Use full relative path for forks ability to find

Part of #60
Merge pull request #119 from Martii/CONTRIBUTING

Contributing
The toobusy package name changed to toobusy-js.
Merge branch 'master' of github.com:OpenUserJs/OpenUserJS.org
Fix issues route regex. Closes #113.