Integrate Mandrill

[msmichellegar]

For transactional emails + to email us when a purchase goes through.

[msmichellegar]

Basically, when the "Confirm payment" button is pressed, these things need to happen:

• payment is processed is Braintree
• email is sent to customer confirming the purchase, including all details
• email is sent to us informing us of the purchase, including all details