move flag icons from locale name to region name (bug 1041520)
change app serializer for feed listing collections (bug 1049209)
use correct app serializer for listing colls, tests (bug 1049209)
Allow anonymous users to subscribe to the newsletter API (bug 1046888)
Merge pull request #2372 from diox/newsletter-desktop

Allow anonymous users to subscribe to the newsletter API (bug 1046888)
Merge pull request #2377 from dethe/duplicate_flag_icons

move flag icons from locale name to region name (bug 1041520)
update account source on FxA login (bug 1047535)
feed shelf unpublish endpoint (bug 1035455)
Merge pull request #2379 from washort/1047535

update account source on FxA login (bug 1047535)
Add developer MOTD (bug 945956)

needs ACL

implemented motd for My Submissions page

added menu to set developer motd

added migration

respond to review feedback

make PEP 8 happy

import permission_required before using

added tests

refactored tests

pep 8 fixes

respond to feedback

address review issues