Added another date - VoR date

Used <publication_date media_type="other"> to have both PoA and VoR date in samples - which means we can potentially use the CrossRef API to pull our publication data, to prevent current manual route
Updated Schema version to 4.3.4

Matched sample file from CrossRef
Matched CrossRef sample
Added funder information according to CrossRef instructions

Removed prefix to FundRef DOI according to CrossRef sample:
https://github.com/CrossRef/rest-api-doc/blob/master/examples/full.xml
Added archive location

As indicated by CrossRef sample
Inserted TDM information

According to instructions from CrossRef. Locations of items not included. TBC