add login check before pull user's repo
Install curl; nix stray backslash; use proper IP address
add -host and -port
improved doc and usage
Merge remote-tracking branch 'upstream/master'

Conflicts:
	docs/sources/examples/python_web_app.rst
Use 127.0.0.1 instead of `hostname` in the "access the web app" section.
Start moving the docker builder into the server
jsonstream WIP
switch to default 127.0.0.1, and mixed the two flags in one. -h
added warning
bring Error: Command not found: <command>
Usage: docker COMMAND [arg...]

A self-sufficient runtime for linux containers.

Commands:
    attach    Attach to a running container
    insert    Insert a file in an image
    login     Register or Login to the docker registry server
    export    Stream the contents of a container as a tar archive
    diff      Inspect changes on a container's filesystem
    logs      Fetch the logs of a container
    pull      Pull an image or a repository from the docker registry server
    restart   Restart a running container
    build     Build a container from Dockerfile or via stdin
    history   Show the history of an image
    kill      Kill a running container
    rmi       Remove an image
    start     Start a stopped container
    tag       Tag an image into a repository
    commit    Create a new image from a container's changes
    import    Create a new filesystem image from the contents of a tarball
    ps        List containers
    rm        Remove a container
    run       Run a command in a new container
    wait      Block until a container stops, then print its exit code
    images    List images
    port      Lookup the public-facing port which is NAT-ed to PRIVATE_PORT
    info      Display system-wide information
    inspect   Return low-level information on a container
    push      Push an image or a repository to the docker registry server
    search    Search for an image in the docker index
    stop      Stop a running container
    version   Show the docker version information back
Implement Context within docker build (not yet in use)
Add missing buildfile.go
remove unused function
Add resize endpoint to api
bump to master
change %f to %g
removed useless params
fix docker login when same username
Merge pull request #699 from dotcloud/docker_login-fix

fix docker login when same username