Post to Mandrill before recording change locally
Post to Mandrill before recording change locally

This way if an API call fails and branch.py crashes, we'll be able to
recover a little easier.

mccolgst/www.gittip.com,gratipay/gratipay.com,eXcomm/gratipay.com,eXcomm/gratipay.com,gratipay/gratipay.com,mccolgst/www.gittip.com,gratipay/gratipay.com,gratipay/gratipay.com,mccolgst/www.gittip.com,studio666/gratipay.com,eXcomm/gratipay.com,studio666/gratipay.com,eXcomm/gratipay.com,mccolgst/www.gittip.com,studio666/gratipay.com,studio666/gratipay.com