Couple permissions fixes for downloading subs
Blind fix for #1846
Fix exception when calling can_view_private_subtitles() (#1851)
Move to a single optional repo
Remove extra language codes when editing managers (#1848)
Merge pull request #1854 from pculture/merge-optional-repos

Move to a single optional repo
some test updates
Merge branch 'staging' into gh-1846
Fixed call to universal_url()
Added audio language in task list for issue 1580
Merge pull request #1857 from pculture/gh-1848

Remove extra language codes when editing managers (#1848)
Merge pull request #1856 from pculture/subtitle-download-permissions

Subtitle download permissions
Return 403 error instead of 404 for permissions errors
Add marker for new lines in subtitles in diffing page
Speed up the user admin page

The query was slow because it was had this clause:

ORDER BY `auth_user`.`username` ASC, `auth_customuser`.`user_ptr_id`

Having 2 tables in the ORDER BY clause makes things super slow, and
it's totally unneeded because username is a unique field.
Merge pull request #1861 from pculture/gh-1580

Added audio language in task list for issue 1580
Added custom message when joining open team
add a test for the user languages #989
Merge pull request #1865 from pculture/gh-829

Added custom message when joining open team
Restore new lines for subs in diff view