Night lighting (#1049)

changes:

rscadd: "Added a button on APCs to set the area lights to a 'night-mode' which is dimmer and saves energy."
rscadd: "Added an automated system to turn 'night-mode' on in hallways between 6pm and 7am in station time."

code/controllers/ProcessScheduler/core/process.dm

@@ -107,6 +107,8 @@
 	last_task = 0
 	last_object = null
 
+/datum/controller/process/proc/preStart()
+
 /datum/controller/process/proc/started()
 	var/timeofhour = TimeOfHour
 	// Initialize last_slept so we can record timing information

code/controllers/ProcessScheduler/core/processScheduler.dm

@@ -84,10 +84,15 @@ var/global/datum/controller/processScheduler/processScheduler
 	isRunning = 1
 	// tick_lag will have been set by now, so re-initialize these
 	scheduler_sleep_interval = world.tick_lag
+	callPreStart()
 	updateStartDelays()
 	spawn(0)
 		process()
 
+/datum/controller/processScheduler/proc/callPreStart()
+	for (var/datum/controller/process/P in processes)
+		P.preStart()
+
 /datum/controller/processScheduler/proc/process()
 	while(isRunning)
 		checkRunningProcesses()