Added the BuffType enumeration for code readability; added support for (but have not implemented) types 10-15 (all 1.298 supported, aside from 15 [which is the NP boost]).
We now load the additional columns from MAGIC_TYPE4 that we need for the existing 1.298 buff types.
Implemented support for max MP buffs, and HP buffs based on percentages.
Implemented support for AC buffs based on percentages.
Implemented BUFF_TYPE_MAGIC_POWER, it just doesn't affect damage output yet.