Small v0.5.6 Update

Changed the follow:

•  Ork AXE has now walking, hurt and die animations
•  When enemies die, they get a new layerMask, so that the arrows will fly through them to damage the living enemies.
•  Arrow is now affected by gravity. The Arrowtip will now rotate to the ground if he flies down.
•  Change the size of the ShootArea, so that the part where to aim is bigger.
•  Arrows are now in a pooling system.
•  Buttons for Arrows/Buffs are now usable with Keys 1,2,3
•  With M you can now mute and unmute the music.