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/email-table.php

@@ -61,5 +61,6 @@ class AdminerEmailTable extends Adminer\Plugin {
 		'pl' => array('' => 'Pobieraj temat i wiadomość e-mail z bazy danych (Adminer Editor)'),
 		'ro' => array('' => 'Obțineți subiectul e-mailului și mesajul din baza de date (Adminer Editor)'),
 		'ja' => array('' => 'メールの件名と本文をデータベースから取得 (Adminer Editor)'),
+		'hr' => array('' => 'Dohvaća predmet i poruku e-pošte iz baze podataka (Adminer Editor)'),
 	);
 }