Add PREMIS as a general metadata standard relevant for research data
Add PREMIS as a general metadata standard relevant for research data

The scope of PREMIS is digital objects, so may exclude non-digital data
but include non-data resources.

Closes #41.

rd-alliance/metadata-directory,gugek/metadata-directory,gugek/metadata-directory,rd-alliance/metadata-directory,rd-alliance/metadata-directory,gugek/metadata-directory