Tg port 2 15 (#230)

* defines/helpers

* globalvars, onclick, controllers

* datums and game

* woooooooooorld. Uh. dm

* modules sans mobs client admin

* modules/admin

* pref shit

* modules/mob

* icon updates

* extra things

* Cherrypicked fixes from open PRs

* metastation.tgm fix

* a better meta fix

* reverts async breakings

code/controllers/subsystem/time_tracking.dm

@@ -0,0 +1,43 @@
+var/datum/subsystem/time_track/SStime_track
+
+/datum/subsystem/time_track
+	name = "Time Tracking"
+	wait = 600
+	flags = SS_NO_INIT|SS_FIRE_IN_LOBBY
+
+	var/time_dilation_current = 0
+
+	var/time_dilation_avg_fast = 0
+	var/time_dilation_avg = 0
+	var/time_dilation_avg_slow = 0
+
+	var/first_run = TRUE
+
+	var/last_tick_realtime = 0
+	var/last_tick_byond_time = 0
+	var/last_tick_tickcount = 0
+
+/datum/subsystem/time_track/New()
+	NEW_SS_GLOBAL(SStime_track)
+
+/datum/subsystem/time_track/fire()
+
+	var/current_realtime = REALTIMEOFDAY
+	var/current_byondtime = world.time
+	var/current_tickcount = world.time/world.tick_lag
+
+	if (!first_run)
+		var/tick_drift = max(0, (((current_realtime - last_tick_realtime) - (current_byondtime - last_tick_byond_time)) / world.tick_lag))
+
+		time_dilation_current = tick_drift / (current_tickcount - last_tick_tickcount) * 100
+
+		time_dilation_avg_fast = MC_AVERAGE_FAST(time_dilation_avg_fast, time_dilation_current)
+		time_dilation_avg = MC_AVERAGE(time_dilation_avg, time_dilation_avg_fast)
+		time_dilation_avg_slow = MC_AVERAGE_SLOW(time_dilation_avg_slow, time_dilation_avg)
+	else
+		first_run = FALSE
+	last_tick_realtime = current_realtime
+	last_tick_byond_time = current_byondtime
+	last_tick_tickcount = current_tickcount
+
+