Instead of creating an OutputPage and then setting a context start initializing Outpu...

Instead of creating an OutputPage and then setting a context start initializing OutputPages 'with' a context and send depreciated calls to extensions directly creating OutputPage instances.
Now that we've taken care of the mess of mTitle inside OutputPage and Skin and made RequestContext track Skin instead of $wgUser we don't need the hack in SpecialPage anymore.