Nightly build would be useful for folks who want to stay on the bleeding
edge of Druid. I'm thinking to add a Jenkins job to
https://builds.apache.org/ which checks every hour that there are changes
in the master branch and builds a new build. Once the build succeeds, the
binary is archived, so that we can add a link to the binary to our web
page. If the build fails, the notification would be sent to
Welcome any thoughts.