Added doc/report.txt & wrote up exercise 1.
Modified BallPanel to use blue ball. Wrote up exercise 2.
Modified BallPanel to use react to window size changes. Wrote up exercise 3.
Modified BallPanel to set ball diameter. Wrote up exercise 4.
Modified BallPanel with duplicate code to accomodate two balls. Wrote up exercise 5.
Modified Ball to pulsate as per instructions. Wrote up exercise 6 and added link to github to report.txt. Done.