FSpec command line runner is missing dependencies

[amirci]

Tried to run the fspec command line runner after installing the nuget package.

I got an exception because the following dependencies are missing:

• FSharp.Core
• FSpec
• CommandLine

[amirci]

Perhaps using something like https://github.com/gluck/il-repack to pack all the dependencies together in the exe.

I'll take a look and see if I can do a pull request.

[stroiman]

If you could create a pull request, that would be awesome.