update readme

Author: andanteyk

README.md

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 A low-allocation collection library using pooled arrays
 
-![](ArrayPoolCollection.png)
+<a href="https://www.nuget.org/packages/AndanteSoft.ArrayPoolCollection">![NuGet Version](https://img.shields.io/nuget/vpre/AndanteSoft.ArrayPoolCollection)</a>
+<a href="LICENSE">![GitHub License](https://img.shields.io/github/license/andanteyk/ArrayPoolCollection)</a>
+<a href="https://www.nuget.org/packages/AndanteSoft.ArrayPoolCollection">![NuGet Downloads](https://img.shields.io/nuget/dt/AndanteSoft.ArrayPoolCollection)</a>
+
+![Logo](ArrayPoolCollection.png)
 
 ## Basic Usage