[Bug 896189] Question owner and Helpful Reply not localizable in questions
[bug 889913] Track l10n coverage % for all locale/product combos.

* Created new model for these metrics
* Added cronjob to calculate and store values
Move email collection script to a proper cron job.
[bug 727088] Script to get and process exit survey results.
[bug 727088] Graph the exit survey results on kpi dash.

* Add API endpoint to the data
* Add the UI
* Test
[bug 881212] Insert text as text instead of html.
[Bug 889903] Make Questions use the new topics.
[bug 893980] Add Firefox 24 to showfor.
[Bug 897453] Make topic selection for new articles easier
[bug 892362] Remove hot topics link from mobile nav.
[bug 896476] Add list of active contributors to locale team page.
[bug 894947] Remove video upload code.
[bug 894929] Update FF logo on download button
[bug 892103] Fix product logos on mobile search
[bug 893742] Update forum notifications email
Fix: use current locale variable instead of request LANGUAGE_CODE.
[bug 896477] Add link from l10n dashboard to l10n team.

* Added a sidebar nav to go back and forth.
[bug 897291] Tweak ES MLT error messages

This should let them aggregate correctly in sentry so we can better
see what's going on.
[bug 889814] Setup infrastructure for Persona auth
Add SITE_URL for Persona.