Use models in /functions and /scripts

[sampl]

Should probably use the models in /source in the scripts and functions to make sure things go smoothly.

Maybe break root dir structure into server/client/models while we're at it

https://babeljs.io/docs/usage/cli/#babel-node

[sampl]

unblocked by 874aca3

[sampl]

On second thought, what do models do that if want in a maintenance script? Not user-based timestamps, maybe the convenience of having key attrs? We use cloud functions for a lot of data consistency things, and they already work with scripts.

Closing until I can think of a good reason to do this