Remove debugging statement
Expand the API to return ratings of multiple packages

- Create the /ratings/<pkgname>/ endpoints which accept a comma delimited list of
packages
- Expand pkg_get_rating to support retrieve ratings for one or more package
- Adjust corresponding unit-tests
Merge branch 'develop' into expand_api
Fix what I think is a broken test.
Merge pull request #114 from fedora-infra/expand_api

Expand api