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/login-table.php

@@ -33,5 +33,6 @@ class AdminerLoginTable extends Adminer\Plugin {
 		'pl' => array('' => 'Uwierzytelnij użytkownika z tabeli "login"'),
 		'ro' => array('' => 'Autentificați un utilizator din tabelul "login"'),
 		'ja' => array('' => '"login" テーブルによるユーザ認証'),
+		'hr' => array('' => 'Autentificira korisnika prema tablici "login"'),
 	);
 }