Fix!
Merge pull request #124 from trangnt57/master

create play-quiz page
Merge pull request #125 from not001praween001/master

Fix!
add accurate rate to user api.
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.
Remove some tmp code.
Remove tmp code.
Update somepage (show.html.erb [new quiz and update quizz show's container])
Do not show the optional list to unsignin user.
Add default avatar.
Add default avatar.
Write Licene policy and codeclimate Link