UPDATED MovingBall.java

Added method nextPositionOfTheBall
Added constant DISPLAY_FREQUENCY
UPDATED MovingBall.java

Added method getSpeedVector
UPDATED MovingBall.java

Updated nextPositionOfTheBall
UPDATED RollingBallGame.java

Finished method play
UPDATED Ball.java

Updated method toString
UPDATED Vector.java

Moved method addPoint from Point.java to Vector.java
Updated method addPoint (now returns a Vector)
Updated method toString
UPDATED Point.java

Moved method addPoint from Point.java to Vector.java
UPDATED Segment.java

Updated method toString
UPDATED MovingBall.java

Updated methods (to fit with the new declaration of a Vector)
Updated method toString
UPDATED Map.java

Fixed constructor Map
UPDATED Main.java

Modified test (longer than previous)
UPDATED RollingBallGame.java
UPDATED MovingBall.java

Updated method setNewSpeed