Add Buffer module compatibility for OCaml < 4.02
Add functions [restart], [kill], [pause], [unpause]
Make: only allow "distclean" (and not "dist-clean")
Make uniform the optional function arguments
Do not output '?' for GET when no query is given
Test Exec with a container's command actually running
Add make dependency setup.data ← src/docker_utils.pre.ml
Remove dependency on Uri
Docker.Container.start: do not override HostConfig by default
Change the interface for binding directories

This makes possible to specify the creation of a new volume for the
container without mounting a host path.
Allow relative host paths for binding
Add a test mounting a host path to the container
Do not call Unix.select if not needed