Fixes #5186
Less shitty undershirt sprites.
Merge pull request #5309 from mwerezak/flashbang

Fixes #5186
Fixes #5283 and #5315

All it took was some fancy switches.
Merge pull request #5313 from Zuhayr/master

Less shitty undershirt sprites.
Fixes #5299
Merge pull request #5316 from Jarcolr/master

Fixes #5283 and #5315
Merge pull request #5321 from mwerezak/diona-lang

Fixes #5299
Merge branch 'master' of https://github.com/Baystation12/Baystation12

Conflicts:
	code/game/jobs/job/science.dm