NYCRHPS Casting

When a user submits a request with a substitute it should send that user a facebook message from the user that is requesting time off. Facebook API for sending messages: https://developers.facebook.com/docs/messenger-platform/send-api-reference

When a user's request is approved or denied, it should send the user an email notifying them of the change in status. Changes: - Store email on a request. - Convert sendmailer to have multiple email templates - Add email template...

So that they can be resubmitted