The most common error is Amazon SES having blacklisted an email address.
However, we handle any error being raised during user.email_user.

Fixes JIRA LMS-131

access login_required page.

Now that we are using separate pages for login and registration rather than
modals, clicking the registration button for a course should direct an
unauthenticated user to the registration page, and the user should be enrolled
in the course upon successful registration. Likewise, an unauthenticated user
attempting to unenroll from a course should be directed to the login page and
subsequently unenrolled from the course upon successful login. The enrollment
change service also now uses HTTP status codes rather than JSON to communicate
status to the front end.

LH: 381, 382, 383

- Remove single enrollment/unenrollment
- Make unenrollment work with multi-email listbox.
- Provide checkbox for auto-enroll on activate if user not yet signed
up.
- Enroll student when activating if auto-enroll flag set.

* hide the login behind a setting that is turned off by default
* clean out some of the outdated settings and hardcoded test strings

Previously it was only set for login

An integrity error while creating an enrollment just means that our work has already been done. Fixes https://www.pivotaltracker.com/story/show/46915947

strings.

Added unit tests that verify the fix.

When a user logs in this will drop a new cookie 'edxloggedin' that will
match the value and expire date of the django session cookie.
When a user logs out the cookie will be removed

Switch timed_module to store location, and use to navigate from timer when timer displays on non-exam course pages.

If certificate status is 'restricted' the grade
and survey link will be shown, the download link will not