big refactor of learnEpVersionsGet
Widgets shall not be buffered in SocialSemanticService, ie. AppData always creates widgets for versions and VersionData no longer fetches Widgets.
EpisodeData takes care of versions AND circle/entities parsing because learnEpVersionsGet also returns these.
Circles/OrgaEntities belong to version, not to organize anymore.
Introduce subResults in SSSModel and recursive decoration.
Remove multiple-kindof decorators and check of isArray on result object directly.
OrganizeView uses Version circles and entities and translates between organize lib and item's data (formerly done by SocialSemanticService).
Change some predicate names for simplicity and conformity with sss.