Extract supportings source code into custom repositories

[Ash258]

To keep this repository cleaner and more relate, it should be shrinked from not needed files (not talking about bucket folder, that's tracked somewhere else). Supporting folder can contains only binaries of each utility, not whole source code, with all project files. (Better management of changes, release page for better updating of them, ...)

Extract validator and shimexe into scoopinstaller github organization. (SideNote: Please rename it to use PascalCase or at least first upper character; it looks better)

Some kind of script for updating them will be required, but it should be only scoop like "installation" into this supporting folder, which would be executed manually. It could be done on user side, but I can't think about best way how to do it. Best solution I can think of is just keep it inside repository to reduce / eliminate error domain.

I would really appreciate this extraction / script to handle getting yaml library without some git tree / submodules way.

[Ash258]

Extraction should be possible even with history: https://help.github.com/articles/splitting-a-subfolder-out-into-a-new-repository/