Added new skills ShootFireball, ShootPotion, ShootProjectile and
ShootSkull.

- 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
Bug fix
Added skills Teleport and Pull, and some optimizations.
Bug fixes
Added skill Consume, damages nearby entities to heal the boss

- consume
radius_horizontal:radius_vertical:damage_amount:heal_amount:entity_type
Bug fix so bosses will respond to attacks with projectiles
Some boss abilities can be triggered now even from non-player sources
Bug fixes. Added better HealthBars support.
Merge pull request #4 from xikage/master

Added new skills ShootFireball, ShootPotion, ShootProjectile and ShootSkull