Added reddwarf-api doc project.

Change-Id: I7f3a69f11d2fdfa492bfc2dacbaac30b5d2c54ec
Reviewed-on: https://review.openstack.org/19664
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Approved: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins