Update README file with some descriptions and installation instructions
Update README file with some descriptions and installation instructions

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