When changing a record's wof:name, require that name value be stored as an alt name

[stepps00]

In our lifecycle rules document, we've stated that when a change to a record's wof:name occurs, that name value should always be stored as a name variant. If that name is not stored as a name variant, that record should be superseded into a new record (for example, if the wof:name was a complete error, but the record still represented a place IRL).

The logic to store this name should look something like:

• Update the wof:name
• Move the existing name:eng_x_preferred value to the name:eng_x_variant property
• Store the old wof:name value in the name:eng_x_variant property list (if not there already)
• Store the new wof:name value in the name:eng_x_preferred property (generally there should just be one value in the preferred list)

Examples: If San Francisco changed names to Oakland, and Oakland wasn't in the alt names before, and the area also changed size, then a new record is needed.

If San Francisco changed default names to Yeurba Beuna , and that was in the list of name variants, and we preserve San Francisco in the name variants, then we "edit in place".

[dphiffer]

This all makes sense, thanks @stepps00 for fleshing out those rules.

Related: #140 #152 #180