Minor update of README
Minor update of README

danimashu/premailer,Guestfolio/premailer,will-in-wi/premailer,constantcontact/premailer,academia-edu/premailer,thebeansgroup/premailer,r-shah/java-premailer-wrapper,ale7714/premailer,thebeansgroup/premailer,will-in-wi/premailer,academia-edu/premailer,ale7714/premailer,Guestfolio/premailer,r-shah/java-premailer-wrapper,PrecisionNutrition/premailer,r-shah/java-premailer-wrapper,constantcontact/premailer,danimashu/premailer,PrecisionNutrition/premailer