Improved graphics objects structure and added a wolf

* Declared most important GraphicsCreature functions as virtual
* Split GraphicsCreatures into GraphicsMonsters and GraphicsCharacters
* Fixed that 'go backwards while in collision bug' (heh) - right now
  while in collision you can't move at all
* Added health and bounding boxes display (hit 'H' or 'U')
* Added effects to Object
* Moved Utils.h to Utils/Math.h