Added Fear ability and gave it to zombie and ocelot morph, and some other things

Added Fear ability and gave it to zombie and ocelot morph, added method to see if player has an ability, and made use of a method in the Event Handler.

Not sure if this is more or less "hacky" than previous attempts at the ability, but it works. I think the icon could use some work, but I think it conveys how it makes certain mobs run away.