add multichoices playing feature.
Merge pull request #127 from not001praween001/about-mutichoice-answer-show

add multichoices playing feature.
Add user permission classification at controller.
revert playing permission in quizz controller.(To be fix again.)
Add playing permission in quizz controller.
Modified permission alert message at quizz controller.
Modified permission alert message at quizz controller.
Merge pull request #128 from not001praween001/user-permission-fixed

Add user permission classification at controller.
Merge pull request #126 from yuchan/add-accurate-rate

add accurate rate to user api.
Write Licene policy and codeclimate Link
Merge pull request #129 from z13052hn/my_branch

Write Licene policy and codeclimate Link