update mocha
Link scope ordered on and today to eachother

Seemed more logical since they share the logic of finding the beginning
and ending of a day
Add scope to add all orders since a date

This will be used to find all active users
An order can find usersnames that still need to order

Based on the recent orders, minus the orders already made today. The
Order class can figure out who still needs to order today.

In the future, when orders are linked to users. This should become a lot
smarter, but it'll do for now...
Hubot can ask for sandwichless users
Merge: Hubot can now ask for sandwichless users

Based on the recent orders, and the orders today, we will guess who
still needs to order.