Ensure that kubectl get works with downstream resources

Commit a198a62 introduced a dependency linking the Kube API versions to the implementation
of watching resources used in kubectl.  This removes that dependency and allows conversion
to be handled by the ObjectConvertor defined in the kubectl factory.

@lavalamp review please
Sounds good. I think we don't need to do anything special to print the internal version; that will happen if you ask for version="".