Bugfix/31 oaidc keywords
Created by: yytosi
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Render subject in oai_dc metadata when study has no keyword.value
There was a faulty condition in oai_dc.xml template where a dc:subject element was not rendered if a study had no keyword.value. Now the subject is always rendered when iterating study.keywords.
Bump version to 1.0.1.
Write changelog entry for 1.0.1 with todays date