Use nuxeo-binary-metadata for handling exif and iptc metadata extraction.
- Mistral should be removed
- Exif mapping remains identical
- IPTC metadata are extracted and stored on dublincore schema: the iptc schema is no more used. We should map a limited number of metadata: source, copyrights (
> dc:rights ), legend (> dc:description ) - Remove the iptc schema from Picture facet, remove the widget displaying the IPTC metadata on the summary.