v25/01/2013

-Added method stubs for most actions to Creature
-Added location data to Creature
-Added progress tracking variables to Simulation
-Added SimulationState abstract superclass
-Added JudgingState class to judge creatures between generations
-Added WorldState class to store information about the world
-Added Direction enum
-Added FoodSource abstract superclass
-Added Obstacle class
-Added Plant class
-Added Remains class
-Added Tile class as part of the World