Set version to 3.1.0-rc1 Change-Id: I783fcde58baa05c7888d156485ca5175be94827a
Global ref-database interface for use with Gerrit Code Review.
Enables the de-coupling between Gerrit, the multi-site plugin and the different implementations of a globally shared ref-database.
The design for a global ref-db interface for Gerrit has been posted to the Gerrit Code Review project for review.