Header include cleanup (2018-11-06)

[ZhilkinSerg]

Summary

SUMMARY: None

Purpose of change

Cleanup unused and duplicate includes. Sort includes alphabetically. Modernize includes.

Additional context

Also includes changes from #26548.

[ZhilkinSerg]

@narc0tiq: I don't get what's wrong here - http://gorgon.narc.ro:8080/job/Cataclysm-PR-Builder/10043/console. Makefile on Jenkins differs from the one on repo? Somebody fixing MacOS builds right now?

[narc0tiq]

Very possible, I just created @Veid's user -- he offered to help fix the osx builds some time ago.

[narc0tiq]

I've reverted the change, so Jenkins rebuild.

[Veid]

@ZhilkinSerg @narc0tiq Yes, that was me. I was trying to test a fix without a lot of fuss. I'm about to create a new pull request to fix the crashing macOS builds.

EDIT:
Pull request: #26564

[narc0tiq]

@Veid No worries, we'll fix it. Jenkins might be spotty for a few minutes, though, as I'm running package updates.

[ZhilkinSerg]

Thanks, @narc0tiq! Can you please also check this when you have some spare time - http://gorgon.narc.ro:8080/job/Cataclysm-Matrix/8128/console?

[Veid]

@ZhilkinSerg I've fixed this -- some incorrect permissions from when I was working earlier.

[ZhilkinSerg]

Thanks.