Add Notifications if a Teacher Adds an Assignment to Canvas Last-Minute

[michaelgira23]

Don't you just hate it when teachers post assignments on Canvas last-minute so you and your classmates miss them? If we start caching Portal/Canvas feeds, we can check if any assignments were changed upon each query. Notify the user somehow (email, push notification, etc.) if an assignment is added that is due the next day (or Monday if it is currently the weekend).

This might be helpful if we get it working, but we don't want to DDoS Canvas. Make sure to find a balance between speed and performance.