QuestTypeMapper is now part of COL_TYPE
small changes
SI Repository simplified
IS Repository simplified a bit more
errors fixed
small changes to SI Repository
Merge branch 'develop' into feature/tboxreasoner-improved
Merge branch 'feature/tboxreasoner-improved' of github.com:ontop/ontop into feature/tboxreasoner-improved

Conflicts:
	obdalib-core/src/main/java/it/unibz/krdb/obda/model/Predicate.java
clean a bit
clean a bit
Merge branch 'feature/tboxreasoner-improved' into develop