Contributing
============
1. Fork it
2. Create your feature branch (`git checkout -b my-new-feature`)
3. Commit your changes (`git commit -am 'Add some feature'`)
4. [**Add tests!**](TESTING.md)
5. Push to the branch (`git push origin my-new-feature`)
6. Create new Pull Request

Contributions will only be accepted if they are fully tested as specified in [TESTING.md](TESTING.md)


Add contributing documentation for supermarket
Add contributing documentation for supermarket

Closes #131
