Added basic descriptions to generic and domain speific items (EUDAT-413)
lib/simplestore_model/metadata/linguistics_metadata_config.py
Added descriptions for every metadata field (EUDAT-314)
Merge branch 'EUDAT-413' of https://github.com/SimpleStore/simplestore into EUDAT-413

Conflicts:
	simplestore/lib/simplestore_model/metadata/linguistics_metadata_config.py
	simplestore/lib/simplestore_model/model.py
Improve 'tags' description (EUDAT-413)
Further description changes (EUDAT-314)
Merge pull request #9 from SimpleStore/EUDAT-413

Eudat 413