Turns out the flag I used for SHGetKnownFolderPath() is not only deprecated
starting with Win10 1703, but it also isn't implemented in Wine. It also was
completely useless because the Save Tool isn't a "packaged process", as the
docs call it. Ah, the joys of using WinAPI...
Magnum's type names are fine, but I'd rather limit what depends on
Magnum as much as possible. Vector types are still allowed, though. No
way I'll write my own.
Debug mode gets outputted to std{out,err}. While most IDEs are sane
enough to capture the streams by default (hello, Qt Creator!), others
aren't (such as CLion, but there's a workaround there), and you can
forget about CMD output as well. Ugh, I hate Windows...
