Updates Tools

Adds toolspeed var, which is a multiplier on how 'fast' the tool works.  0.5 means it goes twice as fast.
Adds usesound var, which determines what sound is used when a tool is being used.
Changes a lot of code to use those two vars instead.
Adds 'ayyy' tools, which are ported from /tg/'s abductor gamemode.  They're currently admin only but I might make them obtainable by xenoarch later.
Adds powertools, also from /tg/.  CE starts with them in a new toolbelt that spawns in their locker, ported from (you guessed it) /tg/.
Changes welder sprites to look nicer, ported yet again from /tg/.  Modified the blue welder slightly so it can be the electric welder sprite.
Adds various sounds from /tg/, for tools and welders.

code/ATMOSPHERICS/components/binary_devices/pump.dm

@@ -227,9 +227,9 @@ Thus, the two variables affect pump operation are set in New():
 		user << "<span class='warning'>You cannot unwrench this [src], it too exerted due to internal pressure.</span>"
 		add_fingerprint(user)
 		return 1
-	playsound(src.loc, 'sound/items/Ratchet.ogg', 50, 1)
+	playsound(src, W.usesound, 50, 1)
 	user << "<span class='notice'>You begin to unfasten \the [src]...</span>"
-	if (do_after(user, 40))
+	if (do_after(user, 40 * W.toolspeed))
 		user.visible_message( \
 			"<span class='notice'>\The [user] unfastens \the [src].</span>", \
 			"<span class='notice'>You have unfastened \the [src].</span>", \