Fix: Missing Public Key and Incorrect Run Variable

[josiahls]

First: Fixed is related to: #32 . For me the docker file would fail to install due to a missing key.

Second: Fixed run_container.bash.
Define DISPLAY_PARAMS:

    DISPLAY_PARAMS=" -v /tmp/.X11-unix:/tmp/.X11-unix -e DISPLAY=unix$DISPLAY"
  else
    echo nvidia-docker-plugin not responding on http://localhost:3476/docker/cli
    echo please install nvidia-docker-plugin
    echo https://github.com/NVIDIA/nvidia-docker/wiki/Installation
    exit -1
  fi
else
  DOCKER_GPU_PARAMS=""
  DISPLAY_PARAMS=""

But in the run section:

docker run --rm --name ${CONTAINER} \
  -e XAUTHORITY=/tmp/.docker.xauth \
  -e ROS_IP=${IP} \
  -e ROS_MASTER_URI=http://${IP}:11311 \
  --ip ${IP} \
  --net ${NETWORK} \
  -v "/etc/localtime:/etc/localtime:ro" \
  -v "/tmp/.docker.xauth:/tmp/.docker.xauth" \
  -v /dev/log:/dev/log \
  ${DOCKER_EXTRA_ARGS} \
  ${DOCKER_GPU_PARAMS} \
  ${DOCKER_DISPLAY_PARAMS} \
  ${IMAGE_NAME} \
  ${COMMAND}

Where is DISPLAY_PARAMS? I think it was meant to be DOCKER_DISPLAY_PARAMS?
My solution is add DISPLAY_PARAMS as an arguement.