Added IP Vigilante (https://www.ipvigilante.com/)

README.md

@@ -240,6 +240,7 @@ For information on contributing to this project, please see the [contributing gu
 | Google Maps | Create/customize digital maps based on Google Maps data | `apiKey` query string | Yes | [Go!](https://developers.google.com/maps/) |
 | IP 2 Country | Map an IP to a country | No | Yes | [Go!](https://ip2country.info) |
 | IP Address Details| Find geolocation with ip address | No | Yes | [Go!](https://ipinfo.io/) |
+| IP Vigilante | Free IP Geolocation API | No | Yes | [Go!](https://www.ipvigilante.com/) |
 | Mapbox | Create/customize beautiful digital maps | `apiKey` query string | Yes | [Go!](https://www.mapbox.com/developers/) |
 | Mapzen Search | Open Source & Open Data Global Geocoding Service | No | Yes | [Go!](https://mapzen.com/products/search/) |
 | Mexico | Mexico RESTful zip codes API | No | Yes | [Go!](https://github.com/IcaliaLabs/sepomex) |