Circle object added.
New function getDistance added to all geometric objects, for finding the shortest distance between two objects.
Vecter2D renamed to Vector.
All geometric objects are now better structured and supports the same functions (where it makes sense):
 - getDistance (All objects)
 - intersects (Line, Circle, Rectangle, Polygon)
 - contains (Circle, Rectangle, Polygon)
Vector.getScalar renamed to Vector.getCross.
New example added: GeometricObjectCollision.
Most examples where broken (due to updates to the engine), they have now been fixed.