Merge pull request #133 from maksimov/2013.07

FB 4309: correct max IOPS is 4000
[maven-release-plugin] prepare release dasein-cloud-aws-2013.07.13
[maven-release-plugin] prepare for next development iteration
Backport of subnet/vpc confusion bugfix.
Merge branch '2013.07' of https://github.com/maksimov/dasein-cloud-aws into 2013.07