Fixed entity add in Player constructor.
Added the function that loads mobs for given level in Level class.
Created basic WaterBalloon enemy class, need to flesh that out more.
Created GameMaster class which is in charge of loading certain mobs
depending on the level given.
Fleshed out the rendering of WaterBalloon mob.
Fixed Sprite of WaterBalloon mob, was rendering 16pixel squares,
changed it to the needed 32 pixel squares