Update top-level README to add billing scripts
Update top-level README to add billing scripts
GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils,GoogleCloudPlatform/bigquery-utils