Merge pull request #40 from kouyaf77/master

Fixed faye url
Add capistrano integrate to dotenv
Using my customize dotenv to reload ENV everytime updated
Merge pull request #41 from kouyaf77/master

Fixed image path for deploy
Add feature of question with link to asked slide number

Add feature of question with link to asked slide number
Remove some unuse code
Merge pull request #42 from huydx/feature/question_with_slide_num

Add feature of question with link to asked slide number
Fixed config for deploy