-   Added support for the `stop_signal` configuration option.

-   Commands `start`, `restart`, `pause`, and `unpause` now exit with an
    error status code if no containers were modified.

-   Added a new `--abort-on-container-exit` flag to `up` which causes `up` to
    stop all container and exit once the first container exits.

-   Removed support for `FIG_FILE`, `FIG_PROJECT_NAME`, and no longer reads
    `fig.yml` as a default Compose file location.

-   Removed the `migrate-to-labels` command.

-   Removed the `--allow-insecure-ssl` flag.

### Bug fixes

-   Fixed a validation bug that prevented the use of a range of ports in
    the `expose` field.

-   Fixed a validation bug that prevented the use of arrays in the `entrypoint`
    field if they contained duplicate entries.

-   Fixed a bug that caused `ulimits` to be ignored when used with `extends`.

-   Fixed a bug that prevented ipv6 addresses in `extra_hosts`.

-   Fixed a bug that caused `extends` to be ignored when included from
    multiple Compose files.

-   Fixed an incorrect warning when a container volume was defined in
    the Compose file.

-   Fixed a bug that prevented the force shutdown behavior of `up` and
    `logs`.

-   Fixed a bug that caused `None` to be printed as the network driver name
    when the default network driver was used.

-   Fixed a bug where using the string form of `dns` or `dns_search` would
    cause an error.

-   Fixed a bug where a container would be reported as "Up" when it was
    in the restarting state.

-   Fixed a confusing error message when DOCKER_CERT_PATH was not set properly.

-   Fixed a bug where attaching to a container would fail if it was using a
    non-standard logging driver (or none at all).

## 1.5.2

(2015-12-03)

-   Fixed a bug which broke the use of `environment` and `env_file` with
    `extends`, and caused environment keys without values to have a `None`
    value, instead of a value from the host environment.

-   Fixed a regression in 1.5.1 that caused a warning about volumes to be
    raised incorrectly when containers were recreated.

-   Fixed a bug which prevented building a `Dockerfile` that used `ADD <url>`

-   Fixed a bug with `docker-compose restart` which prevented it from
    starting stopped containers.

-   Fixed handling of SIGTERM and SIGINT to properly stop containers

-   Add support for using a url as the value of `build`

-   Improved the validation of the `expose` option

## 1.5.1

(2015-11-12)

-   Add the `--force-rm` option to `build`.

-   Add the `ulimit` option for services in the Compose file.

-   Fixed a bug where `up` would error with "service needs to be built" if
    a service changed from using `image` to using `build`.

-   Fixed a bug that would cause incorrect output of parallel operations
    on some terminals.

-   Fixed a bug that prevented a container from being recreated when the
    mode of a `volumes_from` was changed.

-   Fixed a regression in 1.5.0 where non-utf-8 unicode characters would cause
    `up` or `logs` to crash.

-   Fixed a regression in 1.5.0 where Compose would use a success exit status
    code when a command fails due to an HTTP timeout communicating with the
    docker daemon.

-   Fixed a regression in 1.5.0 where `name` was being accepted as a valid
    service option which would override the actual name of the service.

-   When using `--x-networking` Compose no longer sets the hostname to the
    container name.

-   When using `--x-networking` Compose will only create the default network
    if at least one container is using the network.

-   When printings logs during `up` or `logs`, flush the output buffer after
    each line to prevent buffering issues from hiding logs.

-   Recreate a container if one of its dependencies is being created.
    Previously a container was only recreated if it's dependencies already
    existed, but were being recreated as well.

-   Add a warning when a `volume` in the Compose file is being ignored