Do not append computer-name when loading templates
If accountNumber is null, we know the result already. This halves the search time.
Cache listImages on a REGION_ACCOUNT basis
If there is a customization script present, preserve it
Preserve case
Merge pull request #32 from timf/r13.3

Performance and cosmetic improvements
[maven-release-plugin] prepare release dasein-cloud-vcloud-2013.02.12
[maven-release-plugin] prepare for next development iteration