#103 (Sep 13, 2019, 9:49:00 PM)

1. Both stages of futurize. (commit: d4b9660) (details / githubweb)
2. Require install of future. (commit: edb8e75) (details / githubweb)
3. don't use absolute import (commit: 67f2365) (details / githubweb)
4. fix to composite (now works with py3) (commit: 8aaef08) (details / githubweb)

GitHub pull request #176 of commit 8aaef0861b5511fd1f53616645ca79ffb3640e92, no merge conflicts.