Add logging of jclouds messages to separate file
Also move jclouds.ssh out of the debug.log file to jclouds.log
Make jclouds file logging optional
Added comments and removed spurious INFO level logging
Merge pull request #1055 from grkvlt/fix/separate-jclouds-logging

Add logging of jclouds messages to separate file
upgrade to jclouds-163 (pom only - other fixes needed and wanted, following shortly)
use the rc2 staging repository (very temporarily!)
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!