ArticleRatings:
* made internationalization possible
* added missing __METHOD__s to several database calls
* removed unused globals
* RequestContext love for the special pages
* made Special:ChangeRating check database read-only status (the page does write queries and we don't want to allow those to happen when the DB is read-only)
* swapped some raw HTML snippets to Html::input because it makes me feel warm and fuzzy
* removed autoloading of RatingData class in both (!) special pages -- it's already added to the autoloader's list of known classes in the setup file and that's sufficient enough