Add nuget badge

Author: cbovar

README.md

@@ -1,6 +1,8 @@
-| **`VS 2017`** | **`VS 2015`** |
-|-----------------|---------------------|
-|[![Build status](https://ci.appveyor.com/api/projects/status/lcqjebortqnn1wkg?svg=true)](https://ci.appveyor.com/project/cbovar/convnetsharp)|[![Build status](https://ci.appveyor.com/api/projects/status/2vtsgpr9ppo5b4gg?svg=true)](https://ci.appveyor.com/project/cbovar/convnetsharp-0kbf4)|
+| **`VS 2017`** | **`VS 2015`** | **`Nuget`** |
+|-----------------|---------------------|------------------|
+|[![Build status](https://ci.appveyor.com/api/projects/status/lcqjebortqnn1wkg?svg=true)](https://ci.appveyor.com/project/cbovar/convnetsharp)|[![Build status](https://ci.appveyor.com/api/projects/status/2vtsgpr9ppo5b4gg?svg=true)](https://ci.appveyor.com/project/cbovar/convnetsharp-0kbf4)|[![Bond.CSharp NuGet package](https://img.shields.io/nuget/v/Cognitio.ConvNetSharp.Core.svg?style=flat)](https://www.nuget.org/packages/Cognitio.ConvNetSharp.Core/)|
+
+
 
 # ConvNetSharp
 Started initially as C# port of [ConvNetJS](https://github.com/karpathy/convnetjs). You can use ConvNetSharp to train and evaluate convolutional neural networks (CNN).