Code review comment for lp:~leonardr/lazr.restful/version-specific-request-interface

I removed the rubber chicken and changed the text in the section on named utilities to make it more clear. I did this in the second branch because this branch has a lot of test failures (which the job of the second branch is to fix). The second branch already included a doctest of request.version, in the "Request lifecycle" section of multiversion.txt.