Added new item - hailer. Use in hand to make it say HALT! SECURITY!
Should help in asking people to halt while running.
Added hailers to the Sec closets.
Merge branch 'bleeding-edge-freeze' of https://github.com/Baystation12/Baystation12 into whistle

Conflicts:
	baystation12.dme
Added this sound as emote to borgs.
Merge pull request #2940 from comma/whistle

Whistle