Cleaned up the first report.

The second one is messier. The items with P31 = volume are I guess okay, as they have part of = Nordisk familjebok... which in turn is a version/edition/translation. Here's the same report without volumes.

The most reasonable way is force-splitting them I guess, just making separate edition items with basic information and Runeberg connection. It's a mess, but at ~20 items it's manageable, and will prevent more mess when we populate them with data from Libris.

Cleaned up the items that had P31 = book, literary work or the like. There are some instances of periodical literature, encyclopedia and other assorted weird items, but 99% of all the Runeberg items should be reasonably modelled now.