Update README.md for new helper module explanation
Update README.md for new helper module explanation

carolineartz/Polity,4justinstewart/Polity,4justinstewart/Polity,percyhanna/mocha-rice,michael-harrison/jasminerice,percyhanna/mocha-rice,charliesome/better_jasminerice,michael-harrison/jasminerice,carolineartz/Polity