added untested java files for quiz/question/answer objects

Still have to test these, and may change the algorithm but I wanted
Lucas to have access to the public functions(especially on Quiz and
Question) to use for the servlets/jsps. Lucas, use quiz.getNextQuestion
to get the questions when you want to display them. Use
quiz.getQuestionFromVariableName to get the question once you have a
user’s answer to check the answer with question.checkAnswer