deleteQuiz, some stats. getAllQuestionsForQuiz in progress
score history stuff. getting questions for quizzes.
Merge branch 'master' of https://github.com/BrainTrainSite/BrainTrain.git
getPasswordHash. getUserChallengeRequests
Merge branch 'master' of https://github.com/BrainTrainSite/BrainTrain.git