Release process

Preparing a release

1. Bump version number in main.go (format: x.x.x), and in README.md.
2. Run VERSION=vx.x.x make autoneg-manifests, and replace the Google header in deploy/autoneg.yaml
3. Commit locally
4. Create local release tag (git tag vx.x.x -m "Version **v**x.x.x")
5. Push release tag (git push **v**x.x.x origin) which will build and push a release image
6. Make github release, with version vx.x.x pointing to the master commit
7. Bump version in main.go to x.x.(x+1)-dev
8. Commit to master