Add Croatian (hr) translation

Add complete Croatian translation for Adminer, including all strings
in adminer/lang/hr.inc.php, plural forms support in lang.inc.php,
and Croatian descriptions and translations for all plugins.

plugins/editor-setup.php

@@ -43,5 +43,6 @@ class AdminerEditorSetup extends Adminer\Plugin {
 		'de' => array('' => 'Treiber, Server und Datenbank für die Verwendung mit Adminer Editor einrichten'),
 		'ja' => array('' => 'Adminer Editor で使用するドライバ、サーバ、データベースを設定'),
 		'pl' => array('' => 'Konfiguruj sterownik, serwer i bazę danych do użycia z Adminer Editorem'),
+		'hr' => array('' => 'Postavlja upravljački program, poslužitelj i bazu podataka za korištenje s Adminer Editorom'),
 	);
 }