Add russian locale

I also want to do something with untranslated search input `placeholder` in geoposition.js. It would be easier to remove that string completely, though. But I can update the pull request with urls.py and template chages to use [django javascript_catalog view](https://docs.djangoproject.com/en/1.4/topics/i18n/translation/#internationalization-in-javascript-code). What do you think?