Updated map and mapgroup macros to get around an rgbds bug.
Legendary beast locale handling annotated and relabeled.
Added a new constant NUM_ENGINE_FLAGS for use in the EngineFlagAction function. This will make it easier for modders to add or remove engine flags.
Annotated the SGB functions in predef/sgb.asm, and some of the map scripts. Renamed several functions in home. Renamed six WRAM addresses corresponding to party icon animations, and renamed several others relative to these.
