Make owl converter available

The Java executable elot-exporter-0.2-SNAPSHOT.jar will convert an existing ontology file into an ELOT org-mode file. For example, convert a Turtle file myfile.ttl into ELOT format myfile.org with this command:

java -jar elot-exporter-0.2-SNAPSHOT.jar myfile.ttl > myfile.org

Bug reports and feedback is very welcome.