Merge pull request thephpleague#295 from fotografde/master

Added checkout.com Gateway

Author: greydnls

README.md

@@ -110,6 +110,7 @@ Gateway | Composer Package | Maintainer
 [Buckaroo](https://github.com/thephpleague/omnipay-buckaroo) | omnipay/buckaroo | [Kayla Daniels](https://github.com/kayladnls)
 [CardGate](https://github.com/cardgate/omnipay-cardgate) | cardgate/omnipay-cardgate | [CardGate](https://github.com/cardgate)
 [CardSave](https://github.com/thephpleague/omnipay-cardsave) | omnipay/cardsave | [Kayla Daniels](https://github.com/kayladnls)
+[Checkout.com](https://github.com/fotografde/omnipay-checkoutcom) | fotografde/checkoutcom | [fotograf.de](https://github.com/fotografde)
 [Coinbase](https://github.com/thephpleague/omnipay-coinbase) | omnipay/coinbase | [Kayla Daniels](https://github.com/kayladnls)
 [Cybersource](https://github.com/dioscouri/omnipay-cybersource) | dioscouri/omnipay-cybersource | [Dioscouri Design](https://github.com/dioscouri)
 [Cybersource SOAP](https://github.com/DABSquared/omnipay-cybersource-soap) | dabsquared/omnipay-cybersource-soap | [DABSquared](https://github.com/DABSquared)

composer.json

@@ -45,7 +45,8 @@
         "targetpay",
         "twocheckout",
         "worldpay", 
-        "payU"
+        "payU",
+        "checkoutcom"
     ],
     "homepage": "https://github.com/thephpleague/omnipay",
     "license": "MIT",
@@ -120,7 +121,8 @@
         "omnipay/payu": "PayU",
         "paypronl/omnipay-paypro": "PayPro",
         "samvaughton/omnipay-barclays-epdq": "Barclays ePDQ",
-        "teaandcode/omnipay-worldpay-xml": "WorldPay XML Direct"
+        "teaandcode/omnipay-worldpay-xml": "WorldPay XML Direct",
+        "fotografde/omnipay-checkoutcom": "Checkout.com"
     },
     "extra": {
         "branch-alias": {