    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>

peterkshultz/google-api-go-client,webhost/google-api-go-client,jfcote87/api2,80nashi/google-api-go-client,stems/google-api-go-client,skyeunknown084/gmail-api,ropik/google-api-go-client,stephenwithav/google-api-go-client,shibukawa/google-api-go-client,google/google-api-go-client,likaiwalkman/google-api-go-client,ropik/google-api-go-client,googleapis/google-api-go-client,shibukawa/google-api-go-client,google/google-api-go-client,googleapis/google-api-go-client,t9nf/google-api-go-client,jfcote87/api2,digideskio/google-api-go-client,evandbrown/google-api-go-client,krsjoseph/google-api-go-client,odeke-em/google-api-go-client