Update locale files.

Simply running makemessages -a for django and djangojs domains. This doesn't
contain any new translations, just picking up new strings.
Fix some i18n issues and use djblets localization.

This change makes a bunch of small improvements to localization in Beview
Board:
* Switch from ugettext to ugettext_lazy in places where _() is called in a
  "static" way.
* Add 'djblets' to INSTALLED_APPS, so that djblets/locale will be added to the
  locale paths.
* Add 'djblets' to the list of packages which are included in the jsi18n view.
* Switch admin/checks.py to use 'ugettext' instead of 'gettext', since the
  latter just crashes if it sees unicode.

Testing done:
Checked that the djblets i18n worked properly for both backend python/template
strings, as well as front-end javascript strings.

Reviewed at https://reviews.reviewboard.org/r/5091/
Fix the activity widget in the admin to include data from 'today'

The actvity graph in the admin site used 'today' as the end point, which means
that any data actually generated after midnight were not included. This patch
changes the date range to end on today+1.

Testing Done:
Tested on internal production environment.

Reviewed at https://reviews.reviewboard.org/r/5083/
Fix the activity widget in the admin to include data from 'today'

The actvity graph in the admin site used 'today' as the end point, which means
that any data actually generated after midnight were not included. This patch
changes the date range to end on today+1.

Testing Done:
Tested on internal production environment.

Reviewed at https://reviews.reviewboard.org/r/5083/
Make admin activity widget date range parsing a little bit more robust.

It was possible to cause the activity widget in the admin to generate requests
to the server that would generate a 500 response. The issue here was that we
didn't properly sanitize dates unless both the start and end range were
provided.

I've changed it to convert the request parameters to datetimes individually
instead of if they're both necessary, and changed the if/elif/etc block to
verify that the necessary data was provided in request.GET before trying to use
it.

Testing done:
Checked out the admin UI a bit.

Fixes bug 3068.

Reviewed at https://reviews.reviewboard.org/r/5101/
Merge branch 'release-1.7.x'
Add Frederik Braun as the reporter for CVE-2013-4409.

This was, unfortunately, missing from our release notes. I've added him
and given credit for finding and fixing the problem.
Merge branch 'release-1.7.x'