Fix "No accessible member or object constructor named 'Button' takes X
arguments. The named argument 'Clicked' doesn't correspond to any
argument or settable return property for any overload.".
* Added solution file to the FSharpExample project.
* Updated Terminal.Gui and FSharp.Core nuget packages
* Removed the Terminal.Gui nuget package and added the project itself.
* Added a new FrameView constructor with an array of views.
* Changed FSharp Example with the Example Demo file version.
* Fixes the Box10x() issue.