EDIT

ref #6636: try to improve debugging for RIS import

ref #6636: try to improve debugging for RIS import

ref #6636: try to fix test for RIS import

ref #6636: adapt RIS Import for use in Editor

ref #6636 handle Books correctly in RIS import

minor

ref #6636 further improvements to RIS import

ref #6636 further improvements to RIS import

ref #6636 first running version of RisReferenceImport, some important tags are still missing

revert the last change in AbcdImport