Replaced Deltapoint Object with array, added Consumer Unit Factory.

Instead of having 4 seperate properties for the directions North,
South, West and East, there is now just one array containing these four
directions. This makes it easier to enumerate through the deltapoints
and gamepoints.
A factory class has been added to manage the creation and deletion of
Consumer Units.
Consumer Units now also have ‚health’ which depletes when there are
insufficent gamepoints.