Create: Potion Factory

-Fixed a bug where levels of Gravity that were too high would cause Minecraft to think you were on the ground when landing hits, canceling critical hits and reducing damage. Now, mace hits while having the Gravity effect work regardless of the OnGround flag
-Made it so that the Gravity multiplier for maces are applied AFTER all the factors of the target (Strength effects, Mace Enchantments, etc.) and BEFORE all the factors of the target (resistance effects, armor, Protection enchantments, absorbtion hearts, etc.)