Updating broken link to Google Python Style guide
Updating broken link to Google Python Style guide

Old link: https://google-styleguide.googlecode.com/svn/trunk/pyguide.html
New link: https://google.github.io/styleguide/pyguide.html
stweil/letsencrypt,jtl999/certbot,letsencrypt/letsencrypt,lmcro/letsencrypt,jtl999/certbot,stweil/letsencrypt,bsmr-misc-forks/letsencrypt,jsha/letsencrypt,letsencrypt/letsencrypt,lmcro/letsencrypt,bsmr-misc-forks/letsencrypt,jsha/letsencrypt