Update README.rst
Update README.rst

added a link to stage and to production site
shinglyu/moztrap,bobsilverberg/moztrap,mccarrmb/moztrap,mozilla/moztrap,mozilla/moztrap,bobsilverberg/moztrap,shinglyu/moztrap,mccarrmb/moztrap,mccarrmb/moztrap,mccarrmb/moztrap,mozilla/moztrap,bobsilverberg/moztrap,shinglyu/moztrap,shinglyu/moztrap,mozilla/moztrap,shinglyu/moztrap,mozilla/moztrap,mccarrmb/moztrap,bobsilverberg/moztrap