[#C] Internationalization

Course finished view

Quiz view

Grade view

Mass Mail Sender

First page view

[#C] Cancel enrollment if failed two times

[#C] Quiz has one enrollment

add flash notice

Courses can be unavailable

[#A] Quiz for last lesson

[#A] URL to quiz

better login url

Rich text editor for lesson text

Ability for admin to change password

Course finished mail

[#A] Send quiz again if failed

[#A] Grading system

Change email settings to ENV