replace FSharp.Formatting library with 'fsformatting.exe'

@forki: please check this pr with respect to the outlined solution and the TODO comments where I would need your opinions. The //##// comments will be gone after clean up. 

I receive an exception on MetadataFormat.Generate while processing Microsoft.SqlServer.SqlEnum. As everything else seems fine, I am not sure that this is really an issue on fsformatting - looks more like an unresolved dependency.