Update README.md

Fixed license information

Author: FObermaier

README.md

@@ -6,7 +6,7 @@ GeoAPI project provides a common framework based on OGC/ISO standards to improve
 Package | License | Release | Develop | NuGet (release) | MyGet (pre-release) 
 ------- | ------- | ------- | ------- | --------------- | ----------------------
 GeoAPI  | [![LGPL licensed](https://img.shields.io/badge/license-LGPL-blue.svg)](https://github.com/NetTopologySuite/GeoAPI/blob/develop/LICENSE.md) | [![Travis](https://travis-ci.org/NetTopologySuite/GeoAPI.svg?branch=master)](https://travis-ci.org/NetTopologySuite/GeoAPI) | [![Travis](https://travis-ci.org/NetTopologySuite/GeoAPI.svg?branch=develop)](https://travis-ci.org/NetTopologySuite/GeoAPI) |  [![NuGet](https://img.shields.io/nuget/v/GeoAPI.svg?style=flat)](https://www.nuget.org/packages/GeoAPI/) | [![MyGet](https://img.shields.io/myget/nettopologysuite/vpre/GeoAPI.svg?style=flat)](https://myget.org/feed/nettopologysuite/package/nuget/GeoAPI)
-GeoAPI.Core | [![LGPL licensed](https://img.shields.io/badge/license-LGPL-blue.svg)](https://github.com/NetTopologySuite/GeoAPI/blob/develop/LICENSE.md) |  |  |  | [![MyGet](https://img.shields.io/myget/nettopologysuite/vpre/GeoAPI.Core.svg?style=flat)](https://myget.org/feed/nettopologysuite/package/nuget/GeoAPI.Core)
+GeoAPI.Core | [![License](https://img.shields.io/badge/License-BSD%203--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause) |  |  |  | [![MyGet](https://img.shields.io/myget/nettopologysuite/vpre/GeoAPI.Core.svg?style=flat)](https://myget.org/feed/nettopologysuite/package/nuget/GeoAPI.Core)
 GeoAPI.CoordinateSystems | [![LGPL licensed](https://img.shields.io/badge/license-LGPL-blue.svg)](https://github.com/NetTopologySuite/GeoAPI/blob/develop/LICENSE.md) |  |  |  | [![MyGet](https://img.shields.io/myget/nettopologysuite/vpre/GeoAPI.CoordinateSystems.svg?style=flat)](https://myget.org/feed/nettopologysuite/package/nuget/GeoAPI.CoordinateSystems)
 
 ### Supported platforms