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