Ready to production
1st day after production
Ensure at least one sleeping option
Complete UI of comment module
Refactor some code structure
The UI part of comment module is now ready
Complete the comment module
Add unread comment notification on page title
Eliminates new websocket connections

Use the same websocket connection when switching among controllers.
Fix a bug of the voters tip when hover badges
Title unread notification tune up
Add a blackbox feature
Adjust layout of voters ip list
Remove count field for restaurants
Pretty up some code
Ignore the .json files
Move websocket URL to a config file
Add shipping flag
Add lib font-awesome
Add button for image upload

Also modify the navbar.