Multiple Ammo Types
Added Item SlingShot
Added Item SlingBullet
Added Const AMMO_NONE, AMMO_BOW, AMMO_SLING
Added Function CheckAmmo
Added Trigger OnQuequipAmmo to Unequipcb
Added Var @AmmoType to Ammo
Added Var @LauncherType to Launchers
Added File launcher_ammo.txt to scripts