switch some of the examples from using the h2o_cmd.infoFrom* functions to parse the json responses, to use the ParseObj and InspectObj (and SummaryObj) classes in h2o_cmd.py for flexibility (creates a better test api layer)
don't print the __meta entries in the json responses (printing a subset of entries for now, to get a feel for what's there)
Merge branch 'master' of github.com:h2oai/h2o-dev