Adds new nuke toy, plays nuke sound when attack_self'd

Cooldown of 5 minutes

Conflicts:
	code/game/machinery/computer/arcade.dm
	code/game/objects/items/toys.dm
	icons/obj/toy.dmi
Adds a visible_message to the nuke toy when it is used
Adds "surround" arg to playsound, which enables 3D sound

Defaulted to on
Also changes the toy nuke to use it

Conflicts:
	code/game/sound.dm
Minor nuke toy edit

Moved the user.visible_message call out of spawn()
Removed the now obsolete sleep() call and put the delay in spawn()