Cosmetic changes in README.md
Cosmetic changes in README.md

openzipkin/openzipkin.github.io,basvanbeek/openzipkin.github.io,basvanbeek/openzipkin.github.io,openzipkin/openzipkin.github.io,openzipkin/openzipkin.github.io,basvanbeek/openzipkin.github.io