Added TargetInView and TargetAverage.
Added isCircleInView to SteerMath where FieldOfView enum is passed in.
Added LinkedListRectangle as the base class for some of the Spatial Database nodes.
Added SpatialDualTree, splits space up into hotdogs or hamburgers. VERY similar to QuadTree, perhaps a touch faster. Should be optimized.
Added SpatialDualTree to SpatialDatabaseExample.