add some notes to README.md
add some notes to README.md

boneskull/mocha,igwejk/mocha,hoverduck/mocha,igwejk/mocha,adamgruber/mocha,mochajs/mocha,mochajs/mocha,adamgruber/mocha,boneskull/mocha,boneskull/mocha,outsideris/mocha,hoverduck/mocha,mochajs/mocha,outsideris/mocha,hoverduck/mocha,adamgruber/mocha,hoverduck/mocha