ARTILLERY UPDATE

For 5.0

-Added Mortar

-Added Cannon Barrel and Pistol Barrel item

-Added Cannon`d advancement

-Made Hardened Arrow spawn projectiles mid-flight

-Moved mod advancements to a separate tab

-Changed Mobile Artillery advancement to require Flint Mortar

-Changed crafting of Flint Cannon and Flintlock Piston

-Cosmetic changes to Flint Cannon placement in GUI

-Fixed Hardened Arrow Projectile texture