update readme for manual account setup
update readme for manual account setup

Closes https://github.com/ILiedAboutCake/Rustla2/pull/30

slugalisk/Rustla2,slugalisk/Rustla2,ILiedAboutCake/Rustla2,ILiedAboutCake/Rustla2,slugalisk/Rustla2,slugalisk/Rustla2,ILiedAboutCake/Rustla2,ILiedAboutCake/Rustla2