Changes

Summary

1. more robust: avoid NPE due to odd problems with object initialization;
2. RDF meta data for AFP entries; tuned;
3. more strict AFP properties;
4. tuned signature;
5. clarified signature;
6. proper treatment of empty extra lines (amending 98a440cfbb2b);
7. clarified signature: explicitly typed interfaces;
8. provide maintainers as seen in AFP/admin; suppress empty properties;
9. tuned;
10. tuned signature;
11. read AFP metadata for entries;