Add README file for new locales
Add README file for new locales

This is simply a checklist/reminder of all the necessary actions when adding
new locales to the application

wger-project/wger,wger-project/wger,DeveloperMal/wger,rolandgeider/wger,rolandgeider/wger,kjagoo/wger_stark,wger-project/wger,DeveloperMal/wger,rolandgeider/wger,petervanderdoes/wger,kjagoo/wger_stark,kjagoo/wger_stark,petervanderdoes/wger,wger-project/wger,DeveloperMal/wger,rolandgeider/wger,kjagoo/wger_stark,DeveloperMal/wger,petervanderdoes/wger,petervanderdoes/wger