Fixed some back links
Changed title page name
Added academicYear model
Refactored catalog#new view
updated catalog#show view & added status method to catalog model
 Added catalog action to upgrade his version
User now belongs to catalog
User can now choose their catalog
User can now choose their catalog
Cleaned user controller
Fixed typo in landing_page & added empty comment migration
Tuned validation view
Tweaked validation view
Added basic view to create comment
Added error_count attribute to student_program, to count current number of unverified constraints
Student can now justify their unrespected constraints
Added answer model
Added basic view to display discussion to admin
Added basic discussion module for admin user
tunded discussion view