Add Vainglory (#760)

README.md

@@ -367,6 +367,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Rick and Morty](https://rickandmortyapi.com) | All the Rick and Morty information, including images | No | Yes | Yes |
 | [Riot Games](https://developer.riotgames.com/) | League of Legends Game Information | `apiKey` | Yes | Unknown |
 | [Steam](https://developer.valvesoftware.com/wiki/Steam_Web_API) | Steam Client Interaction | `OAuth` | Yes | Unknown |
+| [Vainglory](https://developer.vainglorygame.com/) | Vainglory Players, Matches and Telemetry | `apiKey` | Yes | Yes |
 | [Wargaming.net](https://developers.wargaming.net/) | Wargaming.net info and stats | `apiKey` | Yes | No |
 | [xkcd](https://xkcd.com/json.html) | Retrieve xkcd comics as JSON | No | Yes | Unknown |