Clang errors

[uvcat7]

I used the -fix argument on clang-tidy to squash the hundreds of warnings that our style guide was creating on build.
Think it's fine.

[uvcat7]

I manually fixed another 200 or so warnings by hand. Pretty sure I got them all, but it'd be great if someone could verify.

[convextriangle]

no warnings on my machine
consider escalating warnings to errors in the clang-tidy config to force devs to check stuff like this

[convextriangle]

no warnings on my machine consider escalating warnings to errors in the clang-tidy config to force devs to check stuff like this

as in .clang-tidy:

WarningsAsErrors: '*'

also doublecheck if this does actually work in VS (e.g. do a C style cast somewhere and await the Armageddon)

[uvcat7]

I'll add the clang-tidy enforcement in my next PR!