Fixing path to utils module

Signed-off-by: Ryan Helinski <rlhelinski@gmail.com>
Dropping tables in HTML output when there are no releases.

Signed-off-by: Ryan Helinski <rlhelinski@gmail.com>
Hiding internal functions in new Catalog.addRelease() function.

Signed-off-by: Ryan Helinski <rlhelinski@gmail.com>
Updating tests. This is far from done.

Signed-off-by: Ryan Helinski <rlhelinski@gmail.com>