*Remote API: update progressbar every MIN(1%, 512kB)

* Hack: add a script to create the docker-ut image (busybox + socat)

+ Runtime: mount volumes from a host directory with 'docker run -b'

- Runtime: Fix issue when attaching stdin alone

It's a fork of the mkimage-busybox.sh script and it adds socat to the
image. (socat being needed to add udp support, see #33).

This script, like mkimage-busybox.sh, probably only works on
Debian/Ubuntu.

TestKill and TestMultipleContainers: run sleep instead of cat /bin/zero....

Testing|hack, issue #1009: Update make hack environment

Merge branch 'add-daemon-storage-path-param' of https://github.com/heavenlyhash/docker into heavenlyhash-add-daemon-storage-path-param

* Documentation: Added Swipely's `docker-api` gem to the table of Remote API Client Libraries.

Libraries.

* Runtime: use --numeric-owner for Tar and Untar

* Hack: remove dependency of unit tests on 'os/user', which cannot be used with CGO_ENABLED=0

+ Documentation: Add terminology section

fix regression in utils tests introduced by #980

Fixing hack/Vagrantfile to use uname for aufs linux extras

Conflicts: hack/Vagrantfile
Resolved by: Daniel Mizyrycki <daniel@dotcloud.com>

Bump version to 0.4.6

- Runtime: fix a bug which caused creation of empty images (and volumes) to crash.

Remove dependency on 'os/user', which cannot be used with CGO_ENABLED=0. This allows running the tests without CGO.

Packaging|Ubuntu, issue #526: Follow init permission pattern for docker.conf