Package-Level CRC

Collaborators:
gui package, [OTHERS TO BE INCLUDED LATER]

Responsibilities:
Provide utility classes to the other packages.

Class-Level CRC

Clock implements Runnable

Defines an object that regularly executes the tick() method of all its observers. Objects become observers by executing this clock's addClockObserver() method or by passing themselves to this clock on its creation.

[OTHERS TO BE INCLUDED LATER]