Direct readers to the Google Genomics Cookbook.
Direct readers to the Google Genomics Cookbook.

Also added `--help` and updated `--numWorkers` since the default machine type is now n1-standard-4

iliat/dataflow-java,googlegenomics/dataflow-java,deflaux/dataflow-java,deflaux/dataflow-java,googlegenomics/dataflow-java,jakeakopp/dataflow-java,nitag/dataflow-java,deflaux/dataflow-java,jakeakopp/dataflow-java,googlegenomics/dataflow-java,nitag/dataflow-java,iliat/dataflow-java