Add ADDL_INSTALLED_APPS to studio for parity with lms
Fix message.
Opaque-keys: fix pep8 violations
Opaque-keys: fix pylint violations
StaffFactories accept `course_key`s, not `course`s. Make that clear in the interface.
Fixed some TODOs, removed irrelevant ones
Added trailing slashes otherwise the course_id regex sometimes eats up get parameters.

LMS-2738
Add Oriya language
Add Gujarati language
Update translations (autogenerated message)
Merge pull request #3884 from edx/sarina/052714-translations

Update translations
Merge pull request #3874 from edx/sarina/opaque-keys-cleanup

Sarina/opaque keys cleanup
Merge pull request #3888 from edx/dhm/bug_get_children

Redirect most studio access through draft modulestore
BLD-725: ChoiceGroup i18n.
Extract opaque_keys into a separate library

[LMS-2571]
Fix exception on Internet Explorer when adding first transcript language

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

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

LMS-2747
Allow courses to set Matlab API key globally, in advanced settings.
Updated payload for new matlab endpoint.
DOC-362, another set of students who don't get email