DOC-362, another set of students who don't get email

Fix exception on Internet Explorer when adding first transcript language

Fix ChoiceTextResponse.

JavascriptResponse i18n.

Added trailing slashes to verify_student app urls.

Do not persist anonymous ids when exporting for all students of a course.

ChoiceGroup  i18n.

Two image references incorrectly preceded by a comment

Parse urls with query params for ^/static

i18n of Image Response [BLD-723]

  Query params with a value that starts with /static should have their values converted to the full location.
  Query params with a value that does not start with /static should be left unchanged.

Add tests for has_course

Dhm/opaque dont skip

For large courses this causes export to take a long time and to time out.

LMS-2747

Internet Explorer throws an "Invalid argument" exception when uses an empty string as the parameter in ```namedItem``` method.
Change empty string into null value can maintain browser consistency.

Fix paver python prereq paths

Fixed change log table format & pdf errors

i18n: Make values that has 'display_name' be displayed localized in editor

Opaque keys

Dhm/no package

and negative tests for get_course.

STUD-1592, STUD-1603, LMS-2642

Updates to problem location for opaque keys

Cheatsheet visibility code refactored.

Updated changelog

Fix gen_cert_report to use CourseKeys.

copied from LMS aws_migrate settings