ANY23-425 add iCal, jCal, xCal extractors to META-INF/services
diff --git a/core/src/main/resources/META-INF/services/org.apache.any23.extractor.ExtractorFactory b/core/src/main/resources/META-INF/services/org.apache.any23.extractor.ExtractorFactory
index 2b1df79..99c1dac 100644
--- a/core/src/main/resources/META-INF/services/org.apache.any23.extractor.ExtractorFactory
+++ b/core/src/main/resources/META-INF/services/org.apache.any23.extractor.ExtractorFactory
@@ -28,4 +28,7 @@
org.apache.any23.extractor.rdfa.RDFa11ExtractorFactory
org.apache.any23.extractor.rdfa.RDFaExtractorFactory
org.apache.any23.extractor.xpath.XPathExtractorFactory
-org.apache.any23.extractor.yaml.YAMLExtractorFactory
\ No newline at end of file
+org.apache.any23.extractor.yaml.YAMLExtractorFactory
+org.apache.any23.extractor.calendar.ICalExtractorFactory
+org.apache.any23.extractor.calendar.JCalExtractorFactory
+org.apache.any23.extractor.calendar.XCalExtractorFactory
