Update README.md

Author: SteveWilkes

README.md

@@ -1,7 +1,8 @@
 ## ReadableExpressions
-AgileObjects.ReadableExpressions is a Portable Class Library written in C# exposing an extension method for the 
-[Expression](https://msdn.microsoft.com/en-us/library/system.linq.expressions.expression.aspx) class which converts 
-Expressions or entire [Expression Trees](https://msdn.microsoft.com/en-us/library/bb397951.aspx) into a readable string format.
+
+[![NuGet](http://img.shields.io/nuget/v/AgileObjects.ReadableExpressions.svg)](https://www.nuget.org/packages/AgileObjects.ReadableExpressions)
+
+ReadableExpressions is an extension method for the [Expression](https://msdn.microsoft.com/en-us/library/system.linq.expressions.expression.aspx) class and set of Debugger Visualizers to produce readable, source-code string versions of [Expression Trees](https://msdn.microsoft.com/en-us/library/bb397951.aspx). It targets [.NETStandard 1.0](https://blogs.msdn.microsoft.com/dotnet/2016/09/26/introducing-net-standard) and .NET 4.0.
 
 ### Usage
 The extension method (in the namespace `AgileObjects.ReadableExpressions`) is used like so: