Fix admin login page

This fixes the admin login page so we never ever see it and/or get stuck
there and have to manually type in a url into the urlbar.
[bug 845165] Allow email changes if you're not logged in

The template errored out if you weren't logged in, but when you're
changing your email address, you request the change, then wait for
the email with the link, then click on the link--there's no guarantee
that the user is logged in.

This nixes the crumbs if the user is not logged in thus alleviating
the error.
Update jingo-minify to latest version
fix retina icons
[Bug 845599] Fixes for a small Twitter api change.

It appears that the 'to_user_id' key is not always sent with the
response from Twitter now, and we assumed it would be. This change fixes
the cron job for me.
[bug 845582] Implement ReadOnlyBackend

Instead of wiping out all AUTHENTICATION_BACKENDS which kicks up tons
of errors, this changes read_only_mode to use the brand new
ReadOnlyBackend which categorically rejects everything.
[Bug 844933] Only use well formed troubleshooting

Instead of trying to massage and carefully tip toe aroud the parsed
troubleshooting data, this puts a filter on it so only something that
has 100% of the fields that the template uses and has all the expected
types is used. When the data doesn't match these expectations, it will
appear as plain text, unformatted. This errs on the side of not being
friendly enough, but being much safer.

Hopefully.
[bug 845608] Update django-authority to latest.
[Bug 840262] Add GA events for translation of docs

* When a document is completely untranslated, fire a "Not Translated"
  Google Analytics event.
* When a document is translated but out of date, fire a "Not Updated"
  Google Analytics event. Here "out of date" means it's parent has a
  medium or major level change.

Include medium significance edits.

Fix
[Bug 617735] Fix media gallery search field for l10n.