Streaming output during command execution

[AlexZeitler]

Is there a way of streaming the output while a command is executed? We're doing this in the docker-compose Project:

https://github.com/PDMLab/docker-compose/blob/master/src/index.ts#L88

Would you accept a PR for this?

[vweevers]

Would gladly accept a PR! See also https://github.com/vweevers/node-docker-machine/issues/14#issuecomment-372121402