Repositioned clearing MAR field until instruction is in IR for clarity; the user can see the address in the MAR and match it accross to memory.
Changed empty representation to be blank as opposed to ---. More consistent with the other module displays.
Added clear() method to reset IR; for clarity during execution.
Added display() for sending String representation to GUI via event listener for consistency with other modules, and better functionality.
Activity monitor panel created and added to panel1; positioning and size need adjusting.