Included method to check if a pill's lifespan has reached its end.
Modified evolve() in class RobotzControl to include checks if a pill's
lifespan has expired and removing the pill object if that's the case.
Had to add some ifs to fix NullpointerExceptions due to pill removal.
Implemented getter for pillCountdown.
Added getter, setter and decrement method for pill countdown.
Included pill's countdown-methods in ReadOnlyArena interface.
Minor stuff.
Modified implementation of blinking player, removed unneccessary else{}.