Importer, validation.
Merge branch 'master' of https://github.com/molgenis/molgenis
Fix test
Added date converters
Added refresh method
Added importer test
Revert back to one labelattribute
Rename
Prevent nullpointer
Added tests
Merge branch 'master' of https://github.com/molgenis/molgenis

Conflicts:
	molgenis-data-annotators/src/main/java/org/molgenis/data/annotation/impl/EbiServiceAnnotator.java
	molgenis-data-omx/src/main/java/org/molgenis/data/omx/annotation/OmxDataSetAnnotator.java
Fix test
Fix merge
Merge pull request #1198 from erwinwinder/master

Import validation