It appears GitHub has narrowed the permissions returned, so while we
might still have the ability to admin the *repo*, the permissions
list is returning `false`, so we disallow people to create triggers,
which is wrong.
Fixes https://issues.redhat.com/browse/PROJQUAY-523
Users can now configure whether they want the default tagging options enabled (tag `latest` for the default branch, and tag with the git branch or tag name), and can also specify custom tags, including static tags and dynamic templated tags.
Fixes https://jira.coreos.com/browse/QUAY-1747