This is a bootstrapper that will download the latest version of nuget.exe available and perform an in-place update the first time it's run.
Note that once you get nuget.exe, you can easily keep it up to date by running 'nuget update', which will perform another in-place update if a newer version is available.
By default, this nuget.exe command-line utility will connect to the internet and download NuGet packages from https://nuget.org. If you have modified your NuGet feed sources, those settings will be respected.