Added dutch translations

conf/app.ini

@@ -254,5 +254,5 @@ DRIVER =
 CONN =
 
 [i18n]
-LANGS = en-US,zh-CN,de-DE
-NAMES = English,简体中文,Deutsch
+LANGS = en-US,zh-CN,de-DE,nl-NL
+NAMES = English,简体中文,Deutsch,Nederlands