Fix builds against go 1.5. This should be temporary, since code we
vendor which depends on engine-api should be moving to something else.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
Drop back to a slightly older version of the runtime spec.
Vendor github.com/docker/docker to get type definitions.
Switch to the containers version of storage.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
