Fix Friend model
Fix Users table migrations
Fix migrations
Fix notifications
Add Seen method to Notification model
Implement Seen method in Notification controller
Fix Notification model
Fix notifications
Remove Welcome controller
Add Seen method to Conversation model
Improve Conversations table migrations
Add Unread method to Conversation model
Add Unread method to Conversations controller
Fix Send method of Conversations controller
Add Read method to Conversations controller
Fix Read method of Conversation model
Remove Feed method from Pages controller
Remove Profile method from Pages controller
Add Read method to Users controller
Add Main method to Pages controller