Update README.md

Author: krmorse

README.md

@@ -14,8 +14,11 @@ Rally Software does not actively maintain or support this toolkit.  If you have
 
 [Releases](https://github.com/RallyTools/RallyRestToolkitFor.NET/releases)
 
+## NuGet
+This library is also available as a NuGet package called [Rally.RestApi](https://www.nuget.org/packages/Rally.RestApi/)
+
 ## User Guide 
 
-[Full REST API for .NET API docs](http://rallytools.github.io/RallyRestToolkitFor.NET/Index.html)
+[Full REST API for .NET API docs](http://rallytools.github.io/RallyRestToolkitFor.NET/index.html)
 
 [Web Services API documentation](https://rally1.rallydev.com/slm/doc/webservice)