Material Stacking machine can't be built during round

[NanakoAC]

/obj/machinery/mineral/stacking_machine, in machine_stacking.dm
Leaving aside any issue of circuitboards for a moment, there's a rather fatal issue with this machine. It depends on mapped-in markers for its input and output tiles. Markers which delete themselves on initialize.

So if you do build (or spawn) one during a round, it can never function correctly, at least not without some variable editing

Ideal solution would be an interface for manually configuring the input and output tiles

This problem probably also exists with the ore processor

[ITCups]

Should be ported form europa baystation first