Performance Improvement on Battle/Damage

Dropping MarkZD's INT64 megalomania, his usage of int64 was completely unnecessary and was only taking additional processing time and spawning twice the amount of bytes it actually needed. Also dropping the poorly designed DAMAGE_ macros.
Updating battle.c header to outline Hercules as made by Jman.

Signed-off-by: shennetsind <ind@henn.et>