Convert date to users timezone where appropriate (#153)
Convert date to users timezone where appropriate (#153)

- Default to UTC if the user is not logged in
- Port the koji connector to the new DateTimeDisplay object

Fale/fedora-packages,fedora-infra/fedora-packages,fedora-infra/fedora-packages,fedora-infra/fedora-packages,Fale/fedora-packages,fedora-infra/fedora-packages,Fale/fedora-packages