Added authentication
Add precompiled assets for Heroku
Update Production env for AWS
Redo db schema
remove pry-nav
remove pry-nav 2
delete end in section
fix typo in filename
fix migration
delete migration for heroku
change config for heroku css
attempt to fix heroku css
delete precompiled assets for heroku
delete manifest file to try to fix heroku css
add test mailer
add mailgun configuration
update app domain name in mailgun
ensure uniqueness of student/question for answers
work of jan 10
improve styling and navigation