[bug 916800] Switch from is_superuser to is_manager.
[fix bug 888157] Correctly handle translatable strings with variables.
[fix bug 989342] Allow Managers to delete groups.
Merge pull request #880 from glogiotatidis/888157

[fix bug 888157] Correctly handle translatable strings with variables.
Merge pull request #870 from glogiotatidis/916800

[bug 916800] and [fix bug 989342]
Add localization documentation.

Also cleanup documentation.
Merge pull request #886 from glogiotatidis/docs-upgrade

Add localization documentation.
[bug 916800] Add Django's Auth Backend to enable permissions on Admin Panel.
[bug 842490] Cleanup Invite's Admin panel.
Merge pull request #882 from glogiotatidis/842490

Bits and bytes for bug 842490
Merge pull request #887 from glogiotatidis/fixadmin

[bug 916800] Add Django's Auth Backend to enable permissions on Admin Panel.
[Fix Bug 989342] Let managers delete groups with a test to prove it.
Merge pull request #890 from Sancus/master

[Fix Bug 989342] Let managers delete groups with a test to prove it.
Fix docs index
[fix bug 978998] Display 'Request to Join Group' for moderated groups.
[fix bug 992849] Remove unvouched users from groups.
Update flake8 conf and fix linting errors.

A pep8 / pyflakes update surfaced a few linting errors.
Merge pull request #894 from glogiotatidis/fixpep8

Update flake8 conf and fix linting errors.
Update mozillians-anonymize.sh

copy dev over
Merge pull request #896 from Sheeri/patch-10

Update mozillians-anonymize.sh