* Rename Setup/ to setup/
* Rename Bin/ into assets/ and move under setup/
* Rename Externals/ to externals/
* Move app projects into src/
* Move test projects into tests/
* Move scripts/ to eng/
* Move TranslationApp/ into setup/
We haven't authored NetSpell.SpellChecker project rather have copied
it presumably from https://github.com/loresoft/NetSpell in
fff5303cb2.
It would have been been a better idea to fork the original project, and
send patches upstream.
However the original project appears to be dormant, and its NuGet package
has virtually no consumption, so we're stuck with our copy of the codebase.
Move to Externals folder to better reflect the ownership model.
Gerhard Olsson