Update AUTHORS
Revert "docker.upstart: avoid spawning a `sh` process"

This reverts commit 24dd50490a027f01ea086eb90663d53348fa770e.
Merge pull request #1489 from dotcloud/1422-revert-upstart

Revert "docker.upstart: avoid spawning a `sh` process"
Merge pull request #1483 from titanous/update-authors

Update AUTHORS
Merge branch 'master' of https://github.com/dotcloud/docker