Make logo bigger in README.md
Make logo bigger in README.md

faical-yannick-congo/corr,wd15/corr,faical-yannick-congo/corr,wd15/corr,wd15/corr,usnistgov/corr,usnistgov/corr,faical-yannick-congo/corr,wd15/corr,faical-yannick-congo/corr,usnistgov/corr