Overlay changes, Item system changes
*Overlays now use proper defines, no magic here, no sir!
*Items will properly revert to LAYER_DEFAULT when dropped/taken
*Fixed a missing <br> in rendering of the player's inventory
*Players can now hide (anything) under couch cushions. At a later date this will involve checks to see how well hidden it is.
*world.fps updated to 15, for a smoother experience.