Engine: new command 'kill' sends a signal to a running container
Hack: use new 'kill' command in integration tests
gofmt
Engine: port 'kill' to the new integer status.
New engine command: 'wait'
Engine: don't log job stdout to engine stdout (it might be non-text output, for example tar data for 'export'
Engine: 'export' returns a raw archive of a container's filesystem
Hack: stats.sh prints useful project stats for maintainers
Engine: break out Env utilities into their own type - Env
Engine: Output.AddEnv decodes structured data from the standard output of a job
Engine: convenience http transport for simple remote job execution
Cleanup version introspection

* Unify version checking code into version.go
* Make 'version' available as a job in the engine
* Use simplified version checking code when setting user agent for registry client.
Port 'docker version' to the engine API
Merge pull request #3117 from shykes/engine-refactor-env

Engine: break out Env utilities into their own type - Env
Merge pull request #3118 from shykes/engine-structured-output

Engine: jobs can send structured output as json on stdout
archlinux installation doc: correct some details

1. The AUR package is called docker-git, not lxc-docker-git.

2. According to the official community package, docker depends on
   sqlite.

3. 02ef8ec (Update archlinux.rst as packages have changed, 2013-12-06)
   updated the installation instructions, but left behind residual
   wording about the AUR package not being officially supported; the
   community repository is officially supported.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Added section on Trusted Builds
remove vendored dotcloud/tar

The tar dependency has been removed. It's
time to remove the vendored tar as well.
Merge pull request #3126 from unclejack/remove_vendored_tar

Remove vendored dotcloud/tar
Make it extra clear that the `docker` group is root-equivalent.