-v30/01/2013

-Moved WorldObject into the World folder
-Changed WorldObject interface into an abstract class to allow
collection of common code
-Added movement methods to Creature
v03/02/2013

-Added more accessor methods to Creature
-Added basic stealth functionality to Creature
-Added sorting methods to Creature (get closest x, get weakest x, etc.)
-Rewrote move method in Creature to check desired location before moving
-Made Scenario and Response public enums to resolve an accessibility
problem
-Added methods to find dna size to Gene
-Added methods for manipulating tile contents to WorldState
-Added checks to remove decayed remains to WorldState
-Filled out Plant class
-Filled out Remains class
-Added remaining content access methods to Tile
-Added Euclidean distance and adjacency methods to WorldObject