Need to disambiguate the use of the word json in the code base

[NickChapman]

There are methods for certain models called "get_json" that return the "json representation" which is actually just a dictionary. Of course these dictionaries can be easily converted to json using json.dump[s]. We just need to decide whether we want to return actual json or if we want to change the name of the method to something like get_json_compatible_object.

My reasoning behind this being that down the line it will be confusing to have code that looks like:

json_string = json.dumps(something.get_json())

when you would expect it to be

json_string = something.get_json()