PennCourseAlert Notifications

[r3khaan]

PennCourseAlert (PCA) notifications notify students when a course fills up. We aim to bring this functionality into the iOS app by:

1. delivering notifications natively
2. providing a UI, where students can manage for course alerts

While these notifications are currently delivered via text-message and email, we hope that moving the functionality into the iOS app will:

1. increase usage
2. reduce friction (e.g. imagine being able to cancel a notification directly from the lock screen, instead of on a website)
3. reduce costs (sending bulk text messages is expensive)