Come up with a way to handle duplicate names in listings

[catharsis]

It is not entirely uncommon for duplicate names to show up, when listing something. For example

• different artists may perform under the same name
• the same album name have been released in different regions, or re-released in a new edition on a different year
• as a consequence of the above, the same track may appear on several different albums

We need a deterministic way to handle these name clashes. It is not necessarily a requirement to remove all ambiguity - the requirement is to make it deterministic what resources are listed when.

[catharsis]

This is related to #16, in that we need to generalize presentation of entities, and in some cases make them configurable.