Addition of the following files:

-> Properties.xml - global constants for the Ant Game program.  Please add
new constants to this XML file where you come across them (e.g. paths to files, numerical
constants).  They will be loaded at the start of the program's execution
and made globally available.

Please see the java.util.Properties API page for more details:
http://docs.oracle.com/javase/6/docs/api/java/util/Properties.html

This Java tutorial on Properties is also useful:
http://docs.oracle.com/javase/tutorial/essential/environment/properties.html

-> Enumerated types: AntColour, BrainState, LeftRight, SenseCondition
and SenseDirection.

-> Class "Marker" denoting a chemical marker.  Has two fields: an integer Id
and an assigned AntColour denoting the colony to which the marker belongs

-> A few more exceptions.  The plan for this was to follow the Java convention
of having named exception cases for specific scenarios.
Typo fix