Resolves #455 - volumes_from a service with no containers.

Signed-off-by: Daniel Nephin <dnephin@gmail.com>
Add container.get() which removes the duplication of container.inspect() in every property, and provides a nicer interface for querying container data.

Signed-off-by: Daniel Nephin <dnephin@gmail.com>
Fix some tests failing with docker 1.1.2 and add a comment to recreate_container() explaining what it does.

Signed-off-by: Daniel Nephin <dnephin@gmail.com>
Merge pull request #460 from dnephin/fix_tests_for_docker_1.1

Fix test failures on docker 1.1.2
Merge pull request #456 from dnephin/volumes_from_service

Fix volumes_from a service with no containers
Recommend boot2docker in installation instructions

Fixes #26

Signed-off-by: Ben Firshman <ben@firshman.co.uk>