Circle CI and Docker Compose Version 2 YAML syntax

@epugh make sure that you have docker service enabled in circle.yml

machine:
  pre:
    # https://discuss.circleci.com/t/docker-1-10-0-is-available-beta/2100
    - curl -sSL https://s3.amazonaws.com/circle-downloads/install-circleci-docker.sh | bash -s -- 1.10.0
    - pip install docker-compose==1.8.0
  services:
    - docker