Fill dataset_citation elements through traverse_thredds

[ferrighi]

It should be possible to fill the dataset_citation elements when creating mmd from traversing thredds. I would suggest to do this only for data with no.met.adc prefix, so we can directly build the citation block in the landing pages and we can have a consolidated strategy for how to build this:

• title -> dataset_citation/title
• creator -> dataset_citation/author
• creation date -> dataset_citation/publication_date
• dataset_doi (if present)-> dataset_citation/doi
• landing page -> dataset_citation/url
• "Norwegian Meteorological Institute/Arctic Data Centre" -> dataset_citation/publisher

[steingod]

Sounds good, but how do you get the landing page? That isn't known to traverse_thredds unless people add it to the NetCDF file but I doubt that will be robust nor easy to do. Or?