Medieval Shields

Adds medieval shields to Rimworld. The shields will take hits based on a dice roll taking into account the users melee skill, if successful the shield will take the damage. These shields also allow you to use melee weapons, pistols, PDWs and Heavy SMGs and any weapon from mods that have a weapon tag of MedievalShields_ValidSidearm with them.

Im going to be adding more shields and extending on the "algorithm" a bit more so this is kind of a work in progress but a fully functional one.