Contributive entity builder

[jum-s]

There was an attempt to contribute to entity enhancement, it staled because of several reasons one of which could be the boilerplate necessary to create lists in backbone, another could be because the feature wanted to start to do a lot (multiple authors suggestions, created and updated entity to enrich both) Svelte brings fresh breeze to start over by reducing the boilerplate. It could also be an occasion to reduce the scope of the feature.

[jum-s]

suggestion: start only with an isbn field and only by updating an entity (or only creating an entity (based on dataseed suggestion) but not both) and hide some complexity by offering a form to "edit a book" in general, with all fields necessary to create edition and works and leave the author to the dataseed guess for the moment, in one form/page.