plugin altr: Support sub dir source

Author: Masafumi Yokoyama

plugin-settings/altr.vim

@@ -5,6 +5,7 @@ call altr#define('%.service.js', '%.service.spec.js')
 
 " gettext
 call altr#define('doc/source/%.%', 'doc/locale/ja/LC_MESSAGES/%.po')
+call altr#define('doc/source/%/%.%', 'doc/locale/ja/LC_MESSAGES/%.po')
 
 " Jekyll
 call altr#define('ja/_posts/%', 'en/_posts/%')