remove color and phase accessors from IndustrialMaterial (already in PhaseProperties)
Ocean mountains (islands) now consist of basalt in their top layers,
instead of limestone (assumed to be volcanic in origin).
Move to new BiomeType/BiomeSet elements in the latest COG. Greatly
simplifies the biome restrictions, and lets us move towards better BOP
support. Also, laterite is no longer generated in swamps, just
limonite in dirt (eventually might become peat).