Create test suite to compare results to

Based on #57 there doesn't need to be a "true" value that load calcs are compared against. There is however some interest to compare the results produced by Revit compared to the commercial reference buildings.

[ ] Build geometries for commercial reference buildings in Revit
[ ] Translate using out of the box functionality to OpenStudio and compare results
[ ] Customize the measures to be as close to possible as the commercial reference buildings and compare again.

NREL / gbxml-to-openstudio

Create test suite to compare results to #58