Single tank bombs.

There's a couple of known issues, and they've not been tested, so they're unticked for now.

This includes some adjustments and fixes for other assembly stuff, and it also renames most tanks.

Shout at me if this breaks anything.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4644 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/assembly/timer.dm

@@ -37,8 +37,7 @@
 	timer_end()
 		if((!secured)||(cooldown > 0))	return 0
 		pulse(0)
-		for(var/mob/O in hearers(null, null))
-			O.show_message(text("\icon[] *beep* *beep*", src), 3, "*beep* *beep*", 2)
+		visible_message("\icon[src] *beep* *beep*", "*beep* *beep*")
 		cooldown = 2
 		spawn(10)
 			process_cooldown()