Support .NET Standard 2.0

[panteamihai]

• Updated version to 1.0.0 as we are breaking backward compatibility to .NET Framework 4.5
• Updated sln file to Visual Studio v16.0
• The NuGet package gets created at build time
• The unit test projects target .NET Core 3.1: https://xunit.net/docs/why-no-netstandard
• The package version contains the repo url and copyright
• Removed some dependencies (Zero29, NuGet.CommandLine)
• Removed the local packages from the repo
• Updated FAKE and build script

[CLAassistant]

All committers have signed the CLA.

[ploeh]

Thank you for your interest in Numsense. As you may have observed, this code base has seen no progress for more than four years, which indicates to me that there's virtually no interest in it.

For that reason, I'm not interested in reviving it, with the maintenance responsibility it implies.

I should probably archive it, but another option might be to transfer ownership of it to you. Let me know if that's something you'd be interested in.

[panteamihai]

Hi @ploeh,
The plan is to create a package that targets .NET Standard 2.0.
Under a bit of a time crunch right now, so ownership of the repo is not completely doable, but not dismissing the option to take ownership of the repo at a later date. The library will be used all the while giving you the necessary copyright attributions.