merge with molgenis master branch
Merge branch 'master' of github.com:molgenis/molgenis
Merge branch 'master' of github.com:molgenis/molgenis
Merge branch 'master' of github.com:molgenis/molgenis
automated merge
Merge branch 'master' of github.com:molgenis/molgenis
Merge branch 'master' of github.com:molgenis/molgenis
Convert empty strings to null
Merge branch 'master' of https://github.com/molgenis/molgenis
Added comment
Merge branch 'master' of github.com:molgenis/molgenis
Fix subforms
CategoryRepository exception for protocols without features
Merge pull request #1420 from dennishendriksen/master

CategoryRepository exception for protocols without features
Merge branch 'master' of github.com:molgenis/molgenis
Fix Unload does not work (molgenis #1421 also related to
molgenis-lifelines #64)
Merge branch 'master' of github.com:molgenis/molgenis
Merge pull request #1422 from jjettenn/master

 Fix: Unload does not work (molgenis #1421 also related to molgenis-lifelines #64)
Merge pull request #1419 from erwinwinder/master

Convert empty strings to null
Removed unused code