SSmachines instancing PR (#9080)

* Consistency Pass #1
Power cells of all types are now considered stock parts
Went through materials.dm and did some copy+paste work make material definitions consistent across the codebase (eg "steel" = 50 -> MAT_STEEL = 50)

* Machines are now instances in SSMachines

* Performance improvements by way of instancing all of SSmachines

* Fixes the powersink

* Revert "Consistency Pass #1"

This reverts commit cbeef1b5db.

* Update machines.dm

Styling changes

* Update machines.dm

* Update machines.dm

forgot to update the doc

code/controllers/subsystems/processing/fastprocess.dm

@@ -4,6 +4,7 @@ PROCESSING_SUBSYSTEM_DEF(fastprocess)
 	name = "Fast Processing"
 	wait = 0.2 SECONDS
 	stat_tag = "FP"
+	var/list/machinery = list()
 
 /datum/controller/subsystem/processing/fastprocess/Recover()
 	log_debug("[name] subsystem Recover().")
@@ -12,4 +13,4 @@ PROCESSING_SUBSYSTEM_DEF(fastprocess)
 	var/list/old_processing = SSfastprocess.processing.Copy()
 	for(var/datum/D in old_processing)
 		if(CHECK_BITFIELD(D.datum_flags, DF_ISPROCESSING))
-			processing |= D
+			processing |= D