V1:

  http://www.redhat.com/archives/libvir-list/2012-October/msg01258.html

Eric Blake' comments:

  http://www.redhat.com/archives/libvir-list/2013-January/msg01903.html

Christophe Fergeau's comments:

  http://www.redhat.com/archives/libvir-list/2013-February/msg01282.html  


[TODO] V2 improvements
----------------------

- Test latest upstream improvements
   - QEMU [FIXME - git commit]
   - libvirt [FIXME - git commit]
- Split the patch into smaller pieces for easier review
- Address Eric and Christophe's comments
- Scale down the image relationships to simplest example that
  demonstrates the functionality
- Use consistent terminology and clear descriptions