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.
Trainer data in map scripts is now a macro-defined structure.
Field move functions in main.asm are now nearly completely annotated, with local references.
Trailing white space deleted.
