Modfiy nokogiri version in Gemfile
Fix strange error
Force clean build
Add ckeditor to application.js
Remove force_clean_build
Display HTML emails for lessons
Add welcome page as root, modify login route
Compile assets
Add password change for admin
Clean up
Send mail that course is finished
Commit todos
Modify change password for admin
Test sidekiq
Add mail settings
Show expires if quiz taken
Compute grade in a better way
Fail if grade is lower than 60%
Add rspec
Add factory_girl gem and factories