upgrade to jclouds-163 (pom only - other fixes needed and wanted, following shortly)
use new jclouds ImageChooser support to pick images far more intelligently!
override the GoogleComputeEngineHttpApiModule from 1.6.3 with a newer one in 1.6.x which supports more google identity formats (until 1.6.4 or 1.7.0 is available)
update PortableTemplateBuilder to work with jclouds-163 and jclouds-170
jclouds-163 code review tidies (comment and use guava)
Merge pull request #1088 from ahgittin/jclouds-163

backport of #1080 to 0.6.x