Create config.yml

[faithngetich]

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Make sure these boxes are checked before your pull request is ready to be reviewed and merged. Thanks!

• [ ] tests pass -- rake test
• [x] code is in uniquely-named feature branch, and has been rebased on top of latest master (especially if you've been asked to make additional changes)
• [x] pull request are descriptively named
• [x] if possible, multiple commits squashed if they're smaller changes
• [ ] reviewed/confirmed/tested by another contributor or maintainer

Please be sure you've reviewed our contribution guidelines at https://publiclab.org/wiki/contributing-to-public-lab-software

Thanks!