Merge pull request thephpleague#370 from aimeoscom/master

Adds Sofort gateway

Author: delatbabel

README.md

@@ -173,6 +173,7 @@ Gateway | Composer Package | Maintainer
 [Secure Trading](https://github.com/meebio/omnipay-secure-trading) | meebio/omnipay-secure-trading | [John Jablonski](https://github.com/jan-j)
 [Sisow](https://github.com/fruitcakestudio/omnipay-sisow ) | fruitcakestudio/omnipay-sisow | [Fruitcake Studio](https://github.com/fruitcakestudio)
 [Skrill](https://github.com/alfaproject/omnipay-skrill) | alfaproject/omnipay-skrill | [João Dias](https://github.com/alfaproject)
+[Sofort](https://github.com/aimeoscom/omnipay-sofort) | aimeoscom/omnipay-sofort | [Aimeos GmbH](https://github.com/aimeoscom)
 [Stripe](https://github.com/thephpleague/omnipay-stripe) | omnipay/stripe | [Kayla Daniels](https://github.com/kayladnls)
 [TargetPay](https://github.com/thephpleague/omnipay-targetpay) | omnipay/targetpay | [Alexander Deruwe](https://github.com/aderuwe)
 [UnionPay](https://github.com/lokielse/omnipay-unionpay) | lokielse/omnipay-unionpay | [Loki Else](https://github.com/lokielse)