April sync (#360)

* Maps and things no code/icons

* helpers defines globalvars

* Onclick world.dm orphaned_procs

* subsystems

Round vote and shuttle autocall done here too

* datums

* Game folder

* Admin - chatter modules

* clothing - mining

* modular computers - zambies

* client

* mob level 1

* mob stage 2 + simple_animal

* silicons n brains

* mob stage 3 + Alien/Monkey

* human mobs

* icons updated

* some sounds

* emitter y u no commit

* update tgstation.dme

* compile fixes

* travis fixes

Also removes Fast digest mode, because reasons.

* tweaks for travis Mentors are broke again

Also fixes Sizeray guns

* oxygen loss fix for vore code.

* removes unused code

* some code updates

* bulk fixes

* further fixes

* outside things

* whoops.

* Maint bar ported

* GLOBs.

code/controllers/subsystem/acid.dm

@@ -1,6 +1,4 @@
-var/datum/controller/subsystem/acid/SSacid
-
-/datum/controller/subsystem/acid
+SUBSYSTEM_DEF(acid)
 	name = "Acid"
 	priority = 40
 	flags = SS_NO_INIT|SS_BACKGROUND
@@ -8,10 +6,6 @@ var/datum/controller/subsystem/acid/SSacid
 	var/list/currentrun = list()
 	var/list/processing = list()
 
-/datum/controller/subsystem/acid/New()
-	NEW_SS_GLOBAL(SSacid)
-
-
 /datum/controller/subsystem/acid/stat_entry()
 	..("P:[processing.len]")
 
@@ -34,7 +28,7 @@ var/datum/controller/subsystem/acid/SSacid
 
 		if(O.acid_level && O.acid_processing())
 		else
-			O.cut_overlay(acid_overlay, TRUE)
+			O.cut_overlay(GLOB.acid_overlay, TRUE)
 			processing -= O
 
 		if (MC_TICK_CHECK)