Add jobify.exe and parallelize.exe
Add a "tools" directory for test/build support tools.
Add jobify.exe from the msvc repo.
Extract parts of jobify into stljobs.h, and author wrappers for other test support.
Add parallelize.exe which runs a command in parallel over all inputs in a directory.
Teach Azure DevOps to enforce clang-format in parallel.
* Affirmatively set _HAS_OLD_IOSTREAMS_MEMBERS=1 to make intellisense in "Open Folder" happy.
* Use add_library(STATIC) and STATIC_LIBRARY_OPTIONS for implib smashing instead of add_custom_command et al.
* Include headers in some of the generated targets so they show up in "open folder" et al.
* Extract the target architecture from VCPKG_TARGET_TRIPLET.
* Add .vs and out/ to .gitignore as VS's open folder creates these.
* Don't link an exe in try_compile.
* Add CMakeSettings.json to make VS happy.
Michael Herwig
Stephan T. Lavavej
Curtis J Bezault
Daniel Marshall
Billy O'Neal
Billy O'Neal