* Reviewed subtypes, making them more specific and adding new ones. * Subtypes now have an associated type of units (length, area, volume, mass, rotation, time, velocity, acceleration). These are not used yet anywhere. * Centralized code that decides the name of array items based on subtype (XYZ, RGB), was copied in 3 places. * RNA_def_float etc functions still need to be update, will do this later together with another change.