#164 Fix article cutoffs (after X paragraphs)

Why is this necessary?  Probably more efficient for the code that depends on a setting to be backward compatible and handle the case where the setting isn't provided.

In the event it is needed you can simplify this by doing:
```else {
  var default = ContentService.getDefaultSettings();
  pb.utils.merge(settings, default);
  settings = default;
}