README and projectile collisions in the new coordinate system.
 Changes to be committed:
	modified:   README.md
	modified:   com/reapersrage/entities/Entity.java
	modified:   com/reapersrage/entities/Item.java
	modified:   com/reapersrage/entities/Mob.java
	modified:   com/reapersrage/entities/Player.java
	modified:   com/reapersrage/game/Game.java
	modified:   com/reapersrage/gfx/Screen.java
	modified:   com/reapersrage/input/Mouse.java
	deleted:    com/reapersrage/things/AllThings.java
	deleted:    com/reapersrage/things/IndexNode.java
	deleted:    com/reapersrage/things/Player.java
	deleted:    com/reapersrage/things/Thing.java
	deleted:    com/reapersrage/things/ThingBlock.java
	deleted:    com/reapersrage/world/tiles/Tile.java