RE-197 Add artifact build/deploy overview
RE-197 Add artifact build/deploy overview

In order to clarify how artifacts are built and
consumed this patch adds a little documentation
to get interested parties started.

mancdaz/rpc-openstack,prometheanfire/rpc-openstack,robb-romans/rpc-openstack,BjoernT/rpc-openstack,rcbops/rpc-openstack,prometheanfire/rpc-openstack,robb-romans/rpc-openstack,hughsaunders/rpc-openstack,BjoernT/rpc-openstack,rcbops/rpc-openstack,jacobwagner/rpc-openstack,hughsaunders/rpc-openstack,mancdaz/rpc-openstack,cloudnull/rpc-openstack,cloudnull/rpc-openstack,jacobwagner/rpc-openstack