Circuits generate a research design datum when the game starts up instead of me having to manually define them every time I make a new circuit. Hopefully this reduces missing circuits due to mistakes. The circuit box also spawns specific circuits using a similar method for similar reasons.
Other things this does:
Splits the reagent related manipulation circuits to their own category, which cleans up a few repeated New()s.
Ports PsiOmegaDelta's port of integrated circuits, which has several improvements in code quality.
Ports a few small things like the weakref datum and some macros.
