added volume guest os and possible device ids
bugzid 4089: added retry time-out when making images
bugzid 4086: added region id context check
Merge pull request #14 from daniellemayne/2013.07

2013.07 - bug fixes for list and make image requests
added null check
Merge pull request #16 from daniellemayne/2013.07

2013.07 - bugzid 3847: added null check
[maven-release-plugin] prepare release dasein-cloud-virtustream-2013.07.5
[maven-release-plugin] prepare for next development iteration
Merge branch '2013.07'
Updating version