Cosmetic changes.
Add post_id to user_badges table.
Add ability to specify custom font awesome icon for badges.
Allow specifying URLs as badge certificates.
Mark badge notification as read when the notification is clicked.
Use Em.computed.match.
Add missing <tbody> tags.
Add notification_id column to user_badges.
Move badge grant_count updating to the UserBadge model callbacks.
Grant system badges in a background job.
Add like-based system badges.
Merge pull request #2431 from vikhyat/badge-system

Custom badge icons