add r2rml api dependencies
Merge branch 'develop' into feature/r2rml
r2rml api needs owlapi 3.5.0
pretty r2rml output
optique r2rml api integration
Merge branch 'feature/r2rml' of https://github.com/ontop/ontop into feature/r2rml
R2RML comments, fixes, and pretty writer
Merge branch 'develop' into feature/r2rml
Merge branch 'feature/r2rml' into develop
Merge branch 'develop' into version2 (new r2rml api)

Conflicts:
	obdalib-sesame/src/main/java/org/semanticweb/ontop/sesame/r2rml/R2RMLParser.java
	obdalib-sesame/src/main/java/org/semanticweb/ontop/sesame/r2rml/R2RMLReader.java
	quest-db/src/main/java/org/semanticweb/ontop/owlrefplatform/questdb/QuestDBVirtualStore.java