Programatically create a container for container tests
update container tests to reflect that stop/start/restart don't respond with a json body
cleanup #changes test which generates a file
Update docker.js tests to reflect changes to v1.8 api which does not return json bodies for #checkAuth and container removes
Merge pull request #24 from lightsofapollo/improve-container-test

Create test container id programmatically and fix various tests which expect json bodies which don't happen anymore