`docker-compose pull SERVICE` pulls dependencies

[aanand]

If a service web depends on a service db, and both services specify an image, then docker-compose pull web will pull the images for both db and web, rather than just web. There's no --no-deps workaround either.

[gilclark]

I changed include_links to include_deps. So it was generalizing the notion of a working with a dependency. In the past if one was pulling an image and it had links to another image that dependency would be pulled too. Now it's the same idea just more generalized (links, volumes, net).

[aanand]

I've just realised it was always passing True as the argument value. Apologies for not actually reading the diff. I've deleted that part of the issue description so people don't get confused by it.

[cweagans]

Just opened a PR for this: #2199