"Query chunking" demonstration notebook

[sedonaprice]

As part of the CASJobs sunsetting efforts, MAST will be providing notebooks demonstrating how to query the Pan-STARRS catalogs at MAST using TAP/ADQL as an alternative access method.

With the retirement of CASJobs, a notebook demonstrating how to split up large/long-running queries that cannot be submitted with a single TAP query (and not overload MAST resources) was identified as a valuable example to be added.

This pull request is to include such a notebook. The queries included are the "full" versions of Q2 and Q4 from the "20 queries for Pan-STARRS", which are intended as another resource. This enables referencing that separate notebook regarding how that query was constructed, and enables this notebook to focus only on the "how to chunk and then submit chunks" aspects.

As a note: a couple of things will require editing before merging. These are flagged with big red text, which will be removed prior to merging:

• Add correct links to the "basic filtering" PS1 20 queries notebook.