How to Release this Repo

1. Determine the current release version with git tag -l. It should look something like vX.Y.Z. We'll call the current version $CV and the new version $NV.
2. On master, run git log $CV.. to list all the changes since the last release.
3. Edit the News section of README.md to include a summary of the changes.
4. Mail the CL containing the README.md changes. When the CL is approved, submit it.
5. Without submitting any other CLs: a. Switch to master. b. Tag the repo with the next version: git tag $NV. c. Push the tag: git push origin $NV.