TODOs fixed ball.java
TODOs fixed Point.java
TODOs fixed RollingBallGame.java
TODOs fixed Score.java
TODOs fixed Segment.java
TODOs fixed Vector.java
Updated Point.java

Add method addPoint
Updated Segment.java

Added method getMiddlePoint
Updated MovingBall.java

Modified method setSpeed
Updated Segment.java

Started method getReactionPower
Updated RollingBallGame.java

Continued function play