Merge pull request #223 from unwin/2014.11

Fix for my noob error.
Revert "changes to set minimum disk size required to use image."

This reverts commit c8af2bb65bb2c1c230dcba8afa897576f0f7557f.
[maven-release-plugin] prepare release dasein-cloud-google-2014.11.3
[maven-release-plugin] prepare for next development iteration
Fix to support setting root disk size to minimum size required by image,
or 10gb if not avaiable.  better fix in develop for core/gce changes.
but for now this solves it without api changes.