Ajax Quiz and Quiz Timer

v1.2.2 - 2015-02-23

• Corrected drip content bug
• Added Ajax functionality to quiz
• rounded quiz grades
• Added quiz time limit setting to Quiz
• Added quiz timer to quiz, front end
• Quiz allowed attempts field now allows unlimited attempts
• Set Ajax lesson delete method to not return empty lesson value
• Set next and previous questions to display below quiz question
• Decoupled Single option select question type from quiz to allow for more question types
• Added Quiz time limit to display on Quiz page
• Added functionality to automatically complete quiz when quiz timer reaches 0
• Moved Quiz functionality methods from front end forms class to Quiz class