Limits hearing sounds in a vacuum

(cherry picked from commit 005c6589c27069e7903aa911d0e44b0de00f306e)

Conflicts:
	code/game/sound.dm
	code/setup.dm
Adjusts the volume change in space

Did some playtesting with energy guns and revolvers in space.

(cherry picked from commit 90f7029f4efdafedfe24e0c7ea741ed6677167c8)

Conflicts:
	code/game/sound.dm
Big nerf and cleanup of 3D sound. should fix most of #5789

(cherry picked from commit 3b5d40c470520cea1e6d5175c378555e2f86af1c)

Conflicts:
	code/game/sound.dm
now you can hear next to you in space!

(cherry picked from commit f6b75d833c8eed5b1c870cf97c7b9ca9a60e02bd)
Sound fixes

(cherry picked from commit e104647404219c96e289677419a6578a5b5b8589)