ndi.cloud.api.files.get_file_upload_url

  GET_FILE_UPLOAD_URL - get an upload URL for an artifact file that will be
  published to NDI Cloud
  Same functionality as ndi.cloud.api.datasets.GET_FILE_UPLOAD_URL

  [RESPONSE,UPLOAD_URL] = ndi.cloud.api.files.GET_FILE_UPLOAD_URL(DATASET_ID, UID)

  Inputs:
    DATASET_ID - a string representing the dataset id
    UID -  a string representing the unique identifier that can be used to
    reference the file in document

  Outputs:
    RESPONSE - the upload summary
    UPLOAD_URL - the upload URL to put the file to