getSpouseLink and getChildLink methods changed to getSpouseFamilyLink and getChildFamilyLink to make them more clear
- All structure classes moved to "structure"
- New class GedcomStructureStorage which can hold all gedcom creator structures and contains some family relations information (all children for an individual, all families of an individual, missing structures, ...)
Renamed GedcomStructureStorage to GedcomCreatorStructureStorage