Add a new extras API endpoint listing the groups that have ACLs in pkgdb2
Add unit-tests for the new /api/groups endpoint
Adjust the description per @abadger's advice
Expand the unit-tests to cover the HTTP_ACCEPT header check
When retrieving the groups, make sure they have at least one Approved ACLs on an active collection
Merge pull request #79 from fedora-infra/groups_api

Groups api