Add user progress model
Annotate user progress model
Default the has_seen_welcome_modal value to false
Add relationships to user_progress, call .progress
Show access code modal on the lessons page
Add user modal for access code
Change learn route to access code route
Change the method to return only json and change the view to show the messages
Once the user has seen the welcome modal, say so
The welcome modal attribute is on the user progress model
Add content to the welcome modal
Set it so that a user only sees the modal once
Merge pull request #1206 from teamleada/mark-access-code-modal

Access Code modal