Modified DELETE to return 404 if the entity being deleted does not exist. Fixed broken equals/hashCode for Human. Started thinking about how to work favorites into the API.
Changed favorites to just be the meal id and added methods to the Humans resource to support favorites.
Changed DELETE of a human to return success (204) regardless of whether the human being deleted existed. This makes the behavior consistent with deletion of favorites and idempotent.
Merge pull request #3 from dgrabows/master

Tweaked humans and added full support for favorites.