Chunk format/Fireball

direction‌^{[until JE 1.16]}: List of 3 doubles. Should be identical to Motion.
life‌^{[until JE 1.16]}: Increments each tick when the projectile is not moving; resets to 0 if it moves. Has no effect, though is still saved/read
power: List of 3 doubles that adds to direction every tick. Act as the acceleration.