Add subscriptions table
Add subscriptions table

taken from https://github.com/gratipay/gratipay.com/commit/bea84819ae52e855e92e3f6f811153c6e712a161

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