[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.
Make translation actually lazy for realz
Update contributor.ltxt

added some email details and a new link
Tweak the email for contributors.
Add a customized version of jQuery UI.

The version of jQuery UI has the Sortable and Datepicker features.

We already have jQuery UI, yes, but it is customized to be a subset.
Adding things after the fact is a PITA, so @rdalal suggested I just make
a new bundle that had what I need in it. It gets bundled with
jingo-minify anyways.
[Bug 847874] Plot topic activity over time.

* Updates elasticutils to add support for histograms.
* Shows volume of questions, broken down by topic.
* Pulls data from ES.
* Configurable date range and bucket size.
* Can reorder and hide topics on the graph.
Feedback.