Provide script to build docker images

Build all docker images one at a time or with one top level call
Fix building of glance images

The rebuild on fedora-rdo-base broke glance building
Fix building of swift images

The swift images are not in the global build script
Improve README.md

This improves the README.md file to document what has been completed.
Merge pull request #7 from sdake/master

Provide script to build docker images