Add ASHRAE 90.1 2016

[DavidGoldwasser]

@mdahlhausen can 2019 be added as well?

Also should I add them to the ComStock list as well?
https://github.com/NREL/openstudio-extension-gem/blob/develop/lib/openstudio/extension/core/os_lib_model_generation.rb#L160

Also, can you provide a sentence or two about what makes COMSTOCk different than choosing the equivalent 90.1. I need to decide if I put that description manually in measure, of maybe find a way to add it to ext gem and have the measures dynamically grab it from here.