    transport/apikey: properly clone request struct
    transport/apikey: properly clone request struct

Fixes issues 33.

R=golang-dev, adg
CC=bradfitz, golang-dev
https://codereview.appspot.com/9995043

Committer: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>

tmaiaroto/google-api-go-client,aquarat/google-api-go-client,tmaiaroto/google-api-go-client,freehaha/freehaha-gapi,Shino1024/google-api-go-client,maskofG/google-api-go-client,freehaha/freehaha-gapi,abujehad139/google-api-go-client,maskofG/google-api-go-client,aquarat/google-api-go-client,abujehad139/google-api-go-client,Shino1024/google-api-go-client