fix due to changes in WritableTuple interface
Merge pull request #420 from dennishendriksen/testing

Fix due to changes in WritableTuple interface
fix compile warning
Merge pull request #421 from dennishendriksen/testing

Fix compile warning
added the link between organization and institution, because institution_id is xref to organization_id
Merge branch 'testing' of https://github.com/molgenis/molgenis_apps