Adjustments to make deviceMeta line up with the new documentation

@kentquirk @jebeck 

These are the jellyfish changes to make jellyfish talk the adjusted `deviceMeta` object from https://github.com/tidepool-org/tidepool-org.github.io/pull/29

I want to merge both of these some time tomorrow, so please give them a once over when you get a chance.
I know these functions were already in this code, but I was too old for Transformers and my kids were too young. I believe I know that the Decepticons were the "bad" Transformers, but I can't for the life of me figure out how that's relevant here. You know I like code to have a sense of humor and a style, but please either explain what this is supposed to be doing or give it a more directly useful name.