Refs #10182; Fixed the following:
- switched layout or listing for relatedItems to an album_view like style
- Used @@plone_interface_info for checking of a certain interface is
  provided by object since get_interfaces comes from eea.versions and
  this package is not dependent on it
- Documented changes inside of eea_relateditems.pt
- Added slot that could replace the folder_summary_style of template with a
  different kind of listing for relatedItems macro