Draft of all URL endpoints

Actually, we do not have notion of an "order" right now, which would be a collection of blackface reservations. To date, I have been thinking about it as a fluid thing. At any given time, any individual mapper has a set of reserved blackfaces. In light of that, it may be best to access the printout at:

```
/user/{user_id}/printable-reservations
```

At any given time you can request this URL and it builds a packet for every reserved, not surveyed blockface.