Add NuGet package

[riyadparvez]

This is for future. Right now the project is WIP. Once it's stable, we should add NuGet package.

[snmslavk]

Hi

https://www.nuget.org/packages/CSharp.DataStructures/1.2.0

I guess that there is already a nuget package, I found it via google. So I think that this issue should be closed.