Update README.md

Author: xfischer

README.md

@@ -1,8 +1,7 @@
 [![NuGet Version](http://img.shields.io/nuget/v/GeoJSON.NET.Contrib.MsSqlSpatial.svg?style=flat)](https://www.nuget.org/packages/GeoJSON.NET.Contrib.MsSqlSpatial/)
 [![NuGet Version](http://img.shields.io/nuget/v/GeoJSON.NET.Contrib.Wkb.svg?style=flat)](https://www.nuget.org/packages/GeoJSON.NET.Contrib.Wkb/) 
 [![NuGet Version](http://img.shields.io/nuget/v/GeoJSON.NET.Contrib.EntityFramework.svg?style=flat)](https://www.nuget.org/packages/GeoJSON.NET.Contrib.EntityFramework/) 
-[![Build status](https://ci.appveyor.com/api/projects/status/8i73123t14xro67k)](https://ci.appveyor.com/project/GeojsonNet/geojson-net-contrib)
-
+[![Build status](https://ci.appveyor.com/api/projects/status/8i73123t14xro67k?svg=true)](https://ci.appveyor.com/project/GeojsonNet/geojson-net-contrib)
 
 # GeoJSON.Net.Contrib 
 Repository for all GeoJSON.Net *.Contrib projects