removed commented / redundant code
Removed redundant code
Forgot to include partial for rendering a single line in application layout file
[Big]: Removed teacher registration ...

Which means any registration => student registration.
We will also not bother with asking for sektion code during registration.
Let the student enroll himself separately and explictly after logging in.
Minor styling changes
Corrected logic of method laid_out?
Added boolean column live to Courses
Auto-log out inactive teachers after 15 seconds ...

This happens when they login using their own password. However, Admins can still login
and access teacher accounts as normal
Merge branch 'temp'