Describe selection of records from query result in Images cheat sheet

[stargaser]

This issue is transferred from the aas_workshop_2020_winter repository which will be archived.

The solutions for Inspecting a Candidate List introduces a way of finding the result the user wants, by looping over records in the results of the image query, and testing on some conditions. The cheat sheet does not have a section on selecting records and we should add one. It needs to contain at least one record-selecting example, but could show different ways of doing it.

I guess one of those ways is to display the table and the user just looks at it (which implicitly is what is in the cheat sheet).

We should also explain .format, .bandpass_id, and .title for records from a result.