Create endpoint for receiving foodcritic results

:fork_and_knife:

This implements the endpoint to receive the results
from Fieri (the cookbook evaluation service) and storing those results on the
specified Cookbook Version.

Fieri should issue a POST request to Supermarket with the cookbook_name,
cookbook_version, foodcritic_failure, and foodcritic_feedback. The last two
get stored on the record.

Trello card: https://trello.com/c/P2plrrPY

Fieri: https://github.com/opscode/fieri
Sneaky sneaky extensions.