LRDOCS-1363 Added language hook to guestbook-portlet project so that the names 'Guestbook' and 'Entry' appear in the Related Assets selector instead of the fully qualified name of the Java model class
LRDOCS-1363 Updated service.xml Guestbook and Entry entities with AssetLinkLocalService references and regenerated services
LRDOCS-1363 Updated EntryLocalServiceImpl's add, update, and delete methods to handle asset links (for related assets)