Adding newPrivateBinder() to the SPI. We're promoting private bindings from an extension to being a part of core Guice!

This code isn't wired up yet, so creating injectors whose modules use this API will fail. In a follow-up CL, I'll add the implementation code and refactor the existing PrivateModule class to build on this.

git-svn-id: d779f126-a31b-0410-b53b-1d3aecad763e
13 files changed