Only show no links message if you have no links.
Remove placeholder from newsletter form.
Bug 976774: Add message for number of clicks/downloads since last visit.

Includes an upgrade to a non-released version of factory_boy because it
has an amazing decorator that disables signals for factories. It's not
used in production, so who cares?!
Show previews of banners in generator and links on dashboard.
Hook up smart banners properly.
Add preview to customization page of both versions of upgrade banners.
Hook up newsletter signup.
Configure string extraction and add a few l10n comments.
Layout for upgrade banner configuration

Show the two banners side by side in wide viewports, stacked in narrow.