Merged mapping.context and mapping.event packages. Moved MappingContext event into context package. Updated Sonargraph architecture description and completed package and dependency mapping.
Introduced Conversion layer with allowed dependencies to Mapping and Core. Added Authentication subsystem to Core layer. Adapted mapping of Cross-store subsystem according to new package name.
Refactored MappingContext.getPersistentPropertyPath(…) to return a PersistentPropertyPath instance which allows iterating over the properties returned for the Property delivered as well as creating dot paths from it.
Renamed Property to PropertyPath and moved it into mapping package.
