Build with C++17, remove nonstd::string_view

[Web-eWorks]

It's finally time - I got fed up with how difficult it is to implement compile-time hashing in C++11, so I might as well merge this branch in.

I make no guarantees this runs on linux or compiles on MSVC; the branch has been sitting for two months but it worked then. Now I'll go back to rewriting the renderer... mutters into the wind

This should be good to go, though I'd prefer if fluffy, TheEG et. al. can take a look and make sure it builds properly on our different development environments. I haven't updated any documentation, but this will require at least Clang 5 / GCC 7 to build, potentially even higher versions as we add more C++17 libraries.

[Web-eWorks]

Will merge changes from #5156 into this branch so it can be merged sometime over the weekend.

[fluffyfreak]

I was trying to review/test it and applying all those changes thinking: "I'm sure that I've done this before" 🤣

I'll wait until you've merged them over instead of redoing them, ugh I am so tired tonight.

[Web-eWorks]

Changes have been merged, the VS solution needs touchup to compile as c++17, but otherwise good to go.

[fluffyfreak]

@Web-eWorks just pushed the VS2019 fixes directly. So it should be good to go whenever you like 👍

[Web-eWorks]

@Web-eWorks just pushed the VS2019 fixes directly. So it should be good to go whenever you like +1

Excellent! Will merge once CI finishes running.

[impaktor]

@fluffyfreak we / @pcercuei and @The-EG were talking about updating the cmake and build scripts such that VS files will be nuked for good. My understanding is, after this update, it will be a one-click change needed in VS, then it's good to go. Just wanted to give you a heads up, and an opportunity to throw a fit :)

[fluffyfreak]

@fluffyfreak we / @pcercuei and @The-EG were talking about updating the cmake and build scripts such that VS files will be nuked for good. My understanding is, after this update, it will be a one-click change needed in VS, then it's good to go. Just wanted to give you a heads up, and an opportunity to throw a fit :)

@impaktor Sure, propose it via a PR I guess and give me a chance to test it out. I've had issues with the CMake builds before and never understood modifying them.