Added source code link, license, etc for Nominatim

README.md

@@ -829,7 +829,7 @@ _Command-line file upload_
 
 - [Graphhopper](https://graphhopper.com/) - Fast routing library and server using OpenStreetMap. ([Source Code](https://github.com/graphhopper/graphhopper)) `Apache-2.0` `Java`
 - [MapBBCodeShare](https://github.com/MapBBCode/share.mapbbcode.org) - Tool for sharing custom OSM maps. Support for annotated markers, polygons, lines, multi-format import/export, multiple layers, shortlinks. ([Demo](http://share.mapbbcode.org/)) `WTFPL/Other` `PHP`
-- [Nominatim](https://nominatim.org/) - Server application for reverse geocoding (address -> coordinates) on OpenStreetMap data
+- [Nominatim](https://nominatim.org/) - Server application for reverse geocoding (address -> coordinates) on OpenStreetMap data. ([Source Code](https://github.com/openstreetmap/Nominatim)) `GPL-2.0` `C`
 - [OpenGTS](http://www.opengts.org/) - Entry-level fleet tracking system. Supports variety of tracking devices and protocols. Comes with rich web-interface and reporting features. ([Demo](http://track.opengts.org/track/Track), [Source Code](https://sourceforge.net/projects/opengts/files/server-base/)) `Apache-2.0` `Java`
 - [OpenStreetMap](http://www.openstreetmap.org/) - OpenStreetMap is a map of the world, created by people like you and free to use under an open license. ([Source Code](https://github.com/openstreetmap/openstreetmap-website)) `GPL-2.0` `Ruby`
 - [Orion](https://github.com/LINKIWI/orion-web) - Powerful OwnTracks API-compliant location data visualization frontend for the web. ([Demo](https://linkiwi.github.io/orion-web/)) `MIT` `Python/Nodejs`