[Bug 847976] Use locale for question progress.

The question listing progress bar did not consider any filters,
specifically locale filters. Considering the level of seperation between
different locales in the questions app, this isn't good.

This change is to consider only the current locale when calculating the
percentage the progress bar should be filled.
Re-update django-eadred.

I accidentally in c9f471dd5f960d040e3fb73492a214daf5c620d8.
[bug 838587] Add support for youtube embeds.

This overloads the [[Video:]] wiki tag so that if the you pass
a youtube URL, a youtube embed is rendered to the article.

We need to do this in two steps because we don't allow iframes
in the markup. So we do a first pass by putting in placeholders,
replace the placeholders at the end with the real embeds.
feedback so far