Terraria-Fied Armor Defense

Just a simple addition for md units because I didn't want to apply this within the same mod as it might mess up a bunch of defense systems, so I made this as a side addition thats completely stackable! No other random dependants.

Anyways--- this just changes how raw defense works, instead of damage reduction, it gets replaced by "per armor point" reduction... meaning if you had 10 armor, then you take 15 damage, it should drop to only 5 damage. Simple as that! But it does not detect anything that directly takes away health under special means such as percentage damage. Not sure if enantments still work like normal on armor that add dmg reduction.

Also incase you take pretty much no damage if a damage source deals less than your armor value, the damage should max at 0.1-1 damage at minimum.