Merge pull request #15 from daniellemayne/2013.07

bugzid 3520: only return local volume options for CS4 and above - 2013.07
Merge pull request #17 from daniellemayne/2013.07

fixed return of unsupported images - 2013.07
[maven-release-plugin] prepare release dasein-cloud-cloudstack-2013.07.3
[maven-release-plugin] prepare for next development iteration