machinery_process() & auto_use_power efficiency tweaks (#2657)

changes:

Machinery now uses machinery_process() instead of process(), allowing machines to be put into SSprocessing-style lists in addition to the machinery list.
Automatic power calculations now involve less proc-calls.

code/modules/power/singularity/collector.dm

@@ -25,7 +25,7 @@ var/global/list/rad_collectors = list()
 	rad_collectors -= src
 	return ..()
 
-/obj/machinery/power/rad_collector/process()
+/obj/machinery/power/rad_collector/machinery_process()
 	//so that we don't zero out the meter if the SM is processed first.
 	last_power = last_power_new
 	last_power_new = 0

code/modules/power/singularity/emitter.dm

@@ -107,7 +107,7 @@
 			src.use_power = 1	*/
 	return 1
 
-/obj/machinery/power/emitter/process()
+/obj/machinery/power/emitter/machinery_process()
 	if(stat & (BROKEN))
 		return
 	if(src.state != 2 || (!powernet && active_power_usage))

code/modules/power/singularity/field_generator.dm

@@ -58,7 +58,7 @@ field_generator power level display
 	connected_gens = list()
 	return
 
-/obj/machinery/field_generator/process()
+/obj/machinery/field_generator/machinery_process()
 	if(Varedit_start == 1)
 		if(active == 0)
 			active = 1

code/modules/power/singularity/generator.dm

@@ -10,7 +10,7 @@
 	var/energy = 0
 	var/creation_type = /obj/singularity
 
-/obj/machinery/the_singularitygen/process()
+/obj/machinery/the_singularitygen/machinery_process()
 	var/turf/T = get_turf(src)
 	if(src.energy >= 200)
 		new creation_type(T, 50)

code/modules/power/singularity/particle_accelerator/particle_control.dm

@@ -149,7 +149,7 @@
 	return
 
 
-/obj/machinery/particle_accelerator/control_box/process()
+/obj/machinery/particle_accelerator/control_box/machinery_process()
 	if(src.active)
 		//a part is missing!
 		if( length(connected_parts) < 6 )