new features:

- database now ignoring duplicates isntead of failing
- automatic loading of importer plugins
- automatic tagging

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

de.srsoftware.cal.importer/src/main/java/de/srsoftware/cal/importer/jena/Kassablanca.java

@@ -90,7 +90,7 @@ public class Kassablanca extends BaseImporter {
 
 	@Override
 	protected List<String> extractTags(Tag eventTag) {
-		return List.of("Kassablanca");
+		return List.of("Kassablanca","Jena");
 	}
 
 	@Override