Bug 824791 - Copy/Link change on /customize page
MWC preview promo for home page from Bug 836048
[bug 807155] Create embeddable contribute form.
Bug 807155: Add /b/ passthrough for embedable contribute form.
[bug 807155] Add missing lang files.
Bug 807155: Fix form string that was broken for l10n.

The text for the privacy policy string was changed recently
for the hacks blog form to add the "target" attribute to
the link for more appropriate behavior when framed. This broke
existing translations however. This commit reverts the string
and uses JS to add the target attribute.
Fix bug  840613 - reorder home page promos

Also adjusted pager time to 7 seconds (was previously 10)
Bug 775542: Query lang files in the proper order.

Skip non-translated lang file entries.
Fix bug 815573.
Device update (Feb 2013)
Bug 841006: Change all donate.m.o to sendto.m.o.
Bug 841393: Do not redirect /zh-TW/firefox/partners/
Bug 841006: Change tabzilla link sendto.m.o -> join.m.o
Bug 775542: Prevent templates from overriding with default langfiles.

The base templates had specified "main" in a "set_lang_files"
tag. This was causing child templates to look in "main.lang"
before the lang file for the template. This removes those
errant calls, as well as prevents such accidental additions
from breaking things in future.
Bug 841773: Upgrade Django.