Added tracking for the number of mobs of each class summoned.
	--Also cleaned the mob constructors
	--Now new Ghost() for example summons a ghost of default attributes
	--These attributes are declared in the class and modified public static
	--All new mobs should behave this way
 Changes to be committed:
	new file:   com/reapersrage/entities/items/GoldPiece.java
	new file:   com/reapersrage/entities/items/Item.java
	modified:   com/reapersrage/entities/mobs/Chest.java
	modified:   com/reapersrage/entities/mobs/Fountain.java
	modified:   com/reapersrage/entities/mobs/Ghost.java
	modified:   com/reapersrage/entities/mobs/MimicFountain.java
	modified:   com/reapersrage/entities/mobs/Mob.java
	modified:   com/reapersrage/game/VectorMath.java
	modified:   com/reapersrage/world/level/RandomLevel.java