Add a Chocolatey Helper

[Jérémie Bertrand]

Hello,

Chocolatey is like apt/get for windows and based on Nuget. Before it was just a light wrapper to nuget so the NugetHelper was enough, but now it use the nuget core library directly and have his own parameters which are differents from Nuget's.
It can be manipulated with the ProcessHelper but I think that a dedicated Helper would be preferable.

What do you think?

Thanks.