Added new skills ShootFireball, ShootPotion, ShootProjectile and ShootSkull

New ranged skills:

- shootfireball power(float):incendiary(true/false):fire_ticks(int)
- shootskull power(float)
- shootprojectile type(arrow,egg,enderpearl,snowball):velocity(float):damage(int)
- shootpotion effect:duration:level:velocity