Name of and contents in files

[rweigel]

• servers.json should be what we now call all.json
• all.json should contain about, catalog, and info response from all servers.
• all-reduced.json should be same as all.json but without bin.centers and bin.ranges if they are arrays
• all-datasets.json contains only datasets, parameter names, and start/stop.

We'll have to work on the naming and structuring.

The code at https://github.com/hapi-server/tutorial-python/blob/main/HAPI_04.ipynb will be used to build the last two.