Add section in docs about selectively running tests
Add section in docs about selectively running tests

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