add shields icons

Author: afernandes

README.md

@@ -1,4 +1,7 @@
 [![Build status](https://ci.appveyor.com/api/projects/status/g0bhdeqso4eydfi6?svg=true)](https://ci.appveyor.com/project/afernandes/connectionfactory-net)
+[![License](https://img.shields.io/badge/License-MIT-blue.svg?maxAge=60)](https://raw.githubusercontent.com/afernandes/ConnectionFactory.NET/master/LICENSE.md)
+[![Release](https://img.shields.io/github/release/afernandes/ConnectionFactory.NET.svg?label=Release&maxAge=60)](https://github.com/afernandes/ConnectionFactory.NET/releases/latest)
+[![Downloads](https://img.shields.io/github/downloads/afernandes/ConnectionFactory.NET/latest/total.svg?label=Downloads&maxAge=60)](https://getsharex.com/downloads/)
 
 Framework Connection Factory .NET
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