Link to os-cloud-config developer docs
Link to os-cloud-config developer docs

Now that os-cloud-config's developer docs are in a state that I'm
happy with them being rather more discoverable, link to them in
openstack-projects.html, in a new section titled "OpenStack related
projects".

Change-Id: Ifb8b92e9b51ac968febde4b24334334323bf0638

potsmaster/openstack-manuals,Akasurde/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,saeki-masaki/openstack-manuals,gongysh2004/openstack-manual,AlekhyaMallina-Vedams/openstack-manuals,potsmaster/openstack-manuals,kairoaraujo/openstack-manuals,saeki-masaki/openstack-manuals,gongysh2004/openstack-manual,Akasurde/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,kairoaraujo/openstack-manuals