QuizImpl passes testGetID() test
added test for getTitle() method
QuizImpl getTitle() method now passes test
added test for getScores() method
QuizImpl now passes all tests
tidied up code
created first test for LiveQuizImpl
expanded test to include quiz 2
corrected typo
LiveQuizImpl now passes testGetQuestions() test
Added test for submitScore() method
submitScore method now passes test
Added test for penaltyForIncorrect() method
penaltyForIncorrect() method now passes tests
Cleaned up code and added comments