Add information to the project README.
Add information to the project README.

Change-Id: I7f345369ded37167eb01e46e9aeb4e9d9940596e

citrix-openstack-build/ironic-lib,faizan-barmawer/ironic-lib,openstack/ironic-lib,faizan-barmawer/elytics,NaohiroTamura/ironic-lib