Changes

==Question 3 - WaitUntil()==

Alarm has a new sorted PriorityQueue waitingThreads to keep track of when waiting threads should be woken, sorted on their wake times from lowest to highest.

It also has a new inner class named waitingThread which contains a reference to the KThread and its associated wakeTime(long).

waitUntil(time){

WaitingThread wt = new WaitingThread (currentThread, currentTime + time);

}

For or while loop that prints out a series of statements. Check that statements for different threads are all printed contiguously according to their respective wake times.

==Question 4 - Communicator==