There is some discussion going on now about a separate library that would just handle authentication. The goal of this issue is:

• figure out a plan to moving the authentication code into a separate library we depend on (apitools? googleauthkit (working name)?)
• make this library exist and add it as a dependency (if not already done)
• remove our custom authentication code and replace it with calls into this outside library to get an authenticated transport

(Forgive me if this is a duplicate issue...)