Make sure all the release artifacts are ignored


git-svn-id: https://svn.apache.org/repos/asf/buildr/trunk@1470077 13f79535-47bb-0310-9956-ffa450edef68
Note the change to use TravisCI


git-svn-id: https://svn.apache.org/repos/asf/buildr/trunk@1470079 13f79535-47bb-0310-9956-ffa450edef68