Generate resource scaffold
Create subject seeds
Add simple_form gem
Add simple_form, clear links controller
Create subject if it does not exist
Add presence validation, change form gem
Add notification
Change form labels
Change links routes
Add regex for url validation, change errors css
Change association to n:n
Nest routes
Change migrations and form
Implement the associations
Add error message to create
Fix subjects controller to work with friendly_id
Remove subjects controller
Merge branch 'feature/new-resource'