Merge pull request #12 from Microsoft/add-nuget-badge

Update README.md

Author: davilimap

README.md

@@ -1,5 +1,6 @@
 JSON Document Transfoms
 ============
+[![NuGet package](https://img.shields.io/nuget/v/Microsoft.VisualStudio.Jdt.svg)](https://nuget.org/packages/Microsoft.VisualStudio.Jdt)
 [![Build status](https://ci.appveyor.com/api/projects/status/xi1ufnfhnhh5e31m/branch/master?svg=true)](https://ci.appveyor.com/project/jviau/json-document-transforms/branch/master)
 
 JSON Document Transforms (JDT) library. Perform transformations on JSON files using another JSON as the specification. This is the C# implementation.