20130812 eth implement simulate data point 53229635

@macumber @nllong @brianlball Please review this branch and also my recent changes to https://github.nrel.gov/Buildings/openstudio-server/tree/master/prototype/pat. I implemented a couple small features, and cleaned up some names, in OpenStudio to make it so that pat_to_json.rb and SimulateDataPoint.rb could be written fairly cleanly, with high level API calls.