Create HDF5 dataset publication notebook

Demonstrate to users how to publish an HDF5 dataset.

Create a new notebook called "hierarchical_dataset_publishing.ipynb" and add it to examples/publication_guides . Look at the existing data publication notebook for an idea of how to get started -- copy the overall format, but feel free to leave out the information about setting up Globus accounts (just add some markdown text pointing to the primary publishing notebook). That notebook is for publishing tabular data, but is a good place to start. Also look at the Foundry documentation for more info.

Start with examples/publishing-guides/dataset_publishing.ipynb and the linked Foundry documentation; compare its structure with the HDF5 publication workflow. Create examples/publication_guides/hierarchical_dataset_publishing.ipynb, omit Globus setup in favor of markdown pointing to the primary publishing notebook, and verify that the notebook demonstrates HDF5 dataset publication.