translate corrections and additions for #145

* changed SettingCtrl.js to refresh the tmhDynamicLocale when the user changes locales.
* removed obsolete dataformats now we are using tmhDynamicLocale from event.html and timers.html
* removed corresponding obsolete keys from the locales *.json.
* added Locale and Determined Locale to the statistics in About.html
* registered nl_nl in app.js
* added new translations for 3 templates