Merge pull request #1076 from ahgittin/fix/clouds

misc fixes for using SL, RAX, GCE
Merge pull request #1075 from ahgittin/misc-gui

misc gui cleanups
upgrade to jclouds-163 (pom only - other fixes needed and wanted, following shortly)
update PortableTemplateBuilder to work with jclouds-163 and jclouds-170
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)
use new jclouds ImageChooser support to pick images far more intelligently!