Added Norwegian Air Shuttle to companies list

Author: rotational

README.md

@@ -928,6 +928,7 @@ Here are some companies/projects using Swagger Codegen in production. To add you
 - [Mporium](http://mporium.com/)
 - [Neverfail](https://neverfail.com/)
 - [NexCap](http://www.nexess-solutions.com/fr/plateforme-iot/)
+- [Norwegian Air Shuttle](https://www.norwegian.com/)
 - [NTT DATA](http://www.nttdata.com/)
 - [nViso](http://www.nviso.ch/)
 - [Okiok](https://www.okiok.com)