Added transport for Norway (Entur)

Added a link to Entur's apis and datasets, providing public transport data for Norway.

README.md

@@ -1049,6 +1049,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Transport for Lisbon, Portugal](https://emel.city-platform.com/opendata/) | Data about buses routes, parking and traffic | `apiKey` | Yes | Unknown |
 | [Transport for London, England](https://api.tfl.gov.uk) | TfL API | `apiKey` | Yes | Unknown |
 | [Transport for Manchester, England](https://developer.tfgm.com/) | TfGM transport network data | `apiKey` | Yes | No |
+| [Transport for Norway](https://developer.entur.org/) | Transport APIs and dataset for Norway | No | Yes | Unknown |
 | [Transport for Paris, France](http://data.ratp.fr/api/v1/console/datasets/1.0/search/) | RATP Open Data API | No | No | Unknown |
 | [Transport for Philadelphia, US](http://www3.septa.org/hackathon/) | SEPTA APIs | No | No | Unknown |
 | [Transport for Sao Paulo, Brazil](http://www.sptrans.com.br/desenvolvedores/api-do-olho-vivo-guia-de-referencia/documentacao-api/) | SPTrans | `OAuth` | No | Unknown |