Allow user to check where volume is binded on host

[pnuz3n]

Inspect container returns the physical location in host where container's volumes are binded. This information was not accessible using docker-java. This merge adds possibility to check this information.

It is used something like:

InspectContainerResponse container = docker.inspectContainerCmd(appid).exec();
    for (VolumeBind bind : container.getVolumes()) {
        System.out.println(bind.getHostPath()+":"+bind.getContainerPath());
    }

[marcuslinke]

@pnuz3n Thanks for this PR! Will take a look and merge it soon.