Docker Compose 1.6 has been released with fancy new format and networking support [1] It would be great to see a 1.6 ebuild [1] https://github.com/docker/compose/releases
I think it requires docker 1.10 - but having an ebuild for that would be nice too!
Have been working on this in my overlay. Currently docker is changing quite a few things with 1.10 and I'm working on updating to compensate. If you need 1.6 in the meantime; please, try the one in my overlay and let me know how well it works. It may be a little bit before I have this in the tree due to work and docker fixes.
Committed to tree. Any issues found should be submitted as new bugs.