First commit of liquid simulation stuff

code/controllers/master_controller.dm

@@ -26,6 +26,7 @@ datum/controller/game_controller
 	var/powernets_cost	= 0
 	var/nano_cost		= 0
 	var/events_cost		= 0
+	var/puddles_cost
 	var/ticker_cost		= 0
 	var/gc_cost         = 0
 	var/total_cost		= 0
@@ -214,6 +215,11 @@ datum/controller/game_controller/proc/process()
 				processEvents()
 				events_cost = (world.timeofday - timer) / 10
 
+				//PUDDLES
+				timer = world.timeofday
+				processPuddles()
+				puddles_cost = (world.timeofday - timer) / 10
+
 				//TICKER
 				timer = world.timeofday
 				last_thing_processed = ticker.type
@@ -227,7 +233,7 @@ datum/controller/game_controller/proc/process()
 				gc_cost = (world.timeofday - timer) / 10
 
 				//TIMING
-				total_cost = air_cost + sun_cost + mobs_cost + diseases_cost + machines_cost + objects_cost + networks_cost + powernets_cost + nano_cost + events_cost + ticker_cost + gc_cost
+				total_cost = air_cost + sun_cost + mobs_cost + diseases_cost + machines_cost + objects_cost + networks_cost + powernets_cost + nano_cost + events_cost + puddles_cost + ticker_cost + gc_cost
 
 				var/end_time = world.timeofday
 				if(end_time < start_time)
@@ -318,6 +324,14 @@ datum/controller/game_controller/proc/process()
 
 	checkEvent()
 
+/datum/controller/game_controller/proc/processPuddles()
+	last_thing_processed = /datum/puddle
+
+	for (var/datum/puddle/Puddle in puddles)
+		if (Puddle)
+			Puddle.process()
+			continue
+
 datum/controller/game_controller/proc/Recover()		//Mostly a placeholder for now.
 	var/msg = "## DEBUG: [time2text(world.timeofday)] MC restarted. Reports:\n"
 	for(var/varname in master_controller.vars)