- Prevents empty notification emails from being sent
- Hooks to WP's post update and rewrite post notification logic
- Prevents scheduling multiple queues of the same newsletter
- Fixes issue with segments not updating when scheduling a newsletter
- Removes depreciated hash field & associated logic
- Simplifies cron status message
- Implements newsletter change detection between scheduled queues
- Implements detection for subscribers who unsubscribed from list
- Implements detection for WP users who changed roles
- Updates scheduler worker logic
- Various fixes
- fixed position of checkbox in comment form
- refactored Subscriber::subscribe() method
- removed Form\Subscribe class in favor of Subscription\Comment (I'll create a similar class for Registration)
- added labels in Settings > Basics for Subscribe in comments & registration
- added method in Setting model to check whether signup confirmation is enabled
- added Subscriber::subscribe($user, $segment_ids)
- refactored Router\Subscribers->subscribe() method to account for new method
- added Form\Subscribe class to handle subscription in comments
- updated Basics settings page (changed "list" to "segment")
- refactored and fixed listing issues (related to Segments)
- removed bulk actions from segments
- added synchronize methods for WP users
- Update action in segments only for WP Users list
- added "type" column to segments (default, wp_users, dynamic...)
- added "status" column to subscriber_segment table (useful soon)
