bug 873833, update the imports of the url pattern functions for
Django>=1.4, r=Pike
Bug 864352 - Implement base Sandstone CSS, r=pike
Bug 864357 - Redesign homepage and Bug 864360 - Embed Firefox in your language video, r=pike
bug 883118, homepage follow up, fix tests, r=jezdez.
When adding tabzilla to elmo, we started including external assets via
//domain.org/foo. Exclude those from assets tests.
bug 883118, remove unused code for the homepage that created two chunks of locales, r=jezdez