Add Sage Pay Server and Direct gateways. Closes #12
Add Sage Pay Server and Direct gateways. Closes #12

luciano-jr/omnipay-common,judgej/omnipay-common,thephpleague/omnipay-common,xola/omnipay-common,delatbabel/omnipay-common,devdemon/omnipay-common,eileenmcnaughton/common,judgej/omnipay-common,AndrewCarterUK/omnipay-common,eileenmcnaughton/common,everpay/omnipay-common,barryvdh/omnipay-common,incarnate/omnipay-common,AndrewCarterUK/omnipay-common,devdemon/omnipay-common,everpay/omnipay-common,incarnate/omnipay-common,luciano-jr/omnipay-common,delatbabel/omnipay-common