Settings of kinds added to FAUNA_KINDS.
OptionalbirdsBird flocks, or false for none.
OptionalfishFish schools, or false for none.
OptionaloriginFloating origin for every kind.
OptionalpredatorsObjects every kind flees from (not JSON).
OptionalseedSeed for every kind.
OptionalstatesMaterial states for every kind.
Settings of Fauna: shared ones, then one entry per kind (its settings, or
falseto turn it off).