Update README to reflect active fork status, drop stale Russian translation

Also backport OccController's getConfig() -> IConfig::class fix (deprecated
internal API -> stable OCP interface), spotted while comparing against
Git-Usr123/occweb.

lib/Controller/OccController.php

@@ -32,7 +32,7 @@ class OccController extends Controller
 
     $this->application = new Application(
       OC::$server->get(\OCP\ServerVersion::class),
-      OC::$server->getConfig(),
+      OC::$server->get(\OCP\IConfig::class),
       OC::$server->get(\OCP\EventDispatcher\IEventDispatcher::class),
       new FakeRequest(),
       $this->logger,