Fidgetty Widget System: Rewrite

[catswhiskers]

I should have said I commented out the offending export statements, first. Then 
I got the boxSizeOf error whilst trying to compile demo. I got the same error 
trying to compile the countButton example (above). Also fidgetty nimble doesn't 
know where cdecl package is. I manually installed that. But please don't let me 
distract you from your herculean efforts. I can wait.