Merge pull request #826 from jjettenn/master

Issue #2132
Bug fix: update link to data explorer plugin
Merge branch 'master' of https://github.com/molgenis/molgenis
Bug fix: re-introduce permission manager plugin
Merge pull request #827 from dennishendriksen/master

Bug fix: update link to data explorer plugin
Update README.md
#2132
Not finished functionality