Mongo time

Seeds and notes on schema design, pending a library for actual models, and code to update server users in the background on a server. `uptime.js` handles database work for the current users and old sessions, and `background.js` is a modified version of `main.js` which uses agenda to schedule recurring jobs instead of running once.
Because the `user` that `add` wants is in a different format than this `user`, since `add` is for things coming from the w output and this push is carrying old data forward.