Added login/logout API calls.
Added login/logout API calls.

mozilla/moztrap,bobsilverberg/moztrap,mozilla/moztrap,mozilla/moztrap,mozilla/moztrap,bobsilverberg/moztrap,shinglyu/moztrap,shinglyu/moztrap,bobsilverberg/moztrap,mccarrmb/moztrap,bobsilverberg/moztrap,mozilla/moztrap,shinglyu/moztrap,shinglyu/moztrap,mccarrmb/moztrap,mccarrmb/moztrap,shinglyu/moztrap,mccarrmb/moztrap,mccarrmb/moztrap