Forbid distant to answer question several times, redirects to next unanswered question
Add some nav buttons in layout
add next_lesson link in lesson show
add next_chapter link to chapter show
Ajoute un bouton répondre au QCM pour les présentiels #53
CSS no underline on button, content bg darker
refactoring views of essais#new exercices#show exercices#index
Add buttons to views
merge conflicts