QuizFactory interface
QuizFactoryImpl inclues code taken from QuizController and includes code
for generating a unique id#
a number of changes to variable names (including "listOfQAndALists"
changed to "quiz"). Moved quiz out of quizFactoryImpl to
quizControllerImpl.
corrections to Javadoc
pushing up all quiz to mop up lots of tinkering being done in most
interfaces and some classes. QuizControllerImpl still heavily under
construction.