Express time

This PR contains the changes from mongo-time and express-time.
Imports a bunch of project boilerplate for hooking to mongo, seeding dev data, and hosting a simple express site to show current users. Most of these files are express auto-generated, `uptime.js` and `background.js` contain stuff that needs to be reviewed, as well as some documentation in `seeds/`.
That's not the problem here, although it applies to my use of asserts below.

The comment is referring to the fact that operations being spawned here aren't closing the connection, but the update on the current object does close it, causing a race condition. I need a semaphore to that only the last one tries to close the connection.