Create advanced_notifications.js.coffee by copying
notifications.js.coffee
Set widget basic properties
Classify plugins by CSS class
Register AdvancedNotification plugin to Kandan
Notify by AdvancedNotification plugin
Skip notification when Notification class not exists
Use independent CSS
Disable Notification plugin
Notify only selected channels in channel list on widget
Extract method
Remove useless blank line
Remove useless return
Remove useless ()
Merge pull request #16 from everyleaf-internal/advanced_notification_plugin

Advanced notification plugin