Water_act system - for all your watery needs

This is the first commit of the Water_act system for monkey cubes,
showers, and mobs. The idea of the system is to outsource the effects of
water to the object/mob being affected instead of a bunch of snowflake
code.

code/modules/mob/living/carbon/carbon.dm

@@ -92,7 +92,6 @@ mob/living
 			return
 	return
 
-
 /mob/living/carbon/electrocute_act(var/shock_damage, var/obj/source, var/siemens_coeff = 1.0, var/def_zone = null)
 	if(status_flags & GODMODE)	//godmode
 		return 0

code/modules/mob/living/carbon/human/human_defense.dm

@@ -488,3 +488,8 @@ emp_act
 		..()
 
 	return
+
+/mob/living/carbon/human/water_act(volume, temperature)
+	..()
+	if(temperature >= 330)	bodytemperature = bodytemperature + (temperature - bodytemperature)
+	if(temperature <= 280)	bodytemperature = bodytemperature - (bodytemperature - temperature)

code/modules/mob/living/living_defense.dm

@@ -238,6 +238,10 @@
 
 //Mobs on Fire end
 
+/mob/living/water_act(volume, temperature)
+	if(volume >= 20)	fire_stacks -= 0.5
+	if(volume >= 50)	fire_stacks -= 1
+
 //This is called when the mob is thrown into a dense turf
 /mob/living/proc/turf_collision(var/turf/T, var/speed)
 	src.take_organ_damage(speed*5)