Add Impala Hotel Bookings (#2399)

README.md

@@ -1338,6 +1338,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Grab](https://developer.grab.com/docs/) | Track deliveries, ride fares, payments and loyalty points | `OAuth` | Yes | Unknown |
 | [GraphHopper](https://graphhopper.com/api/1/docs/) | A-to-B routing with turn-by-turn instructions | `apiKey` | Yes | Unknown |
 | [Icelandic APIs](http://docs.apis.is/) | Open APIs that deliver services in or regarding Iceland | No | Yes | Unknown |
+| [Impala Hotel Bookings](https://docs.impala.travel/docs/booking-api/) | Hotel content, rates and room bookings | `apiKey` | Yes | No |
 | [Izi](http://api-docs.izi.travel/) | Audio guide for travellers | `apiKey` | Yes | Unknown |
 | [Metro Lisboa](http://app.metrolisboa.pt/status/getLinhas.php) | Delays in subway lines | No | No | No |
 | [Navitia](https://api.navitia.io/) | The open API for building cool stuff with transport data | `apiKey` | Yes | Unknown |