changes sms and email reminder messages

Adds new messages in to config.json for sms and email (they're the same text right now).

If you wan to test locally you need to declare <code>contact</code> in <code>createReminders()</code>. This could be either an email address string (e.g. <code>'kavih@example.com</code>) or a phone number string(e.g.<code>'4155555555'</code>). 
I'd like to tag this for future discussion. My preference is for keeping relative time language like *tomorrow* out of the text. That way if reminders are sent at a different time, the wording would still work. 
* **Current**: Reminder: Street sweeping is tomorrow (MM/DD/YY) on the side of STREET NAME from 8am - 5pm.
* **Suggested**: Reminder: Street sweeping is MM/DD/YY on the side of STREET NAME from 8am - 5pm.