update message and add translation

Author: araname

lang/en/settings.php

@@ -1,4 +1,3 @@
 <?php
 
 $lang['path'] = 'The path to your local graphviz dot binary (eg. <code>/usr/bin/dot</code>). Leave empty to use remote rendering at google.com.';
-

lang/ko/settings.php

@@ -0,0 +1,8 @@
+<?php
+/**
+ * Korean language file
+ *
+ * @author Myeongjin <[email protected]>
+ */
+
+$lang['path'] = '로컬 graphviz dot 바이너리로의 경로 (예를 들어 <code>/usr/bin/dot</code>). google.com에서 원격 렌더하기를 사용하려면 비워 두세요.';