Extraction of ORCiD from XML files sent by APS

[Piakret]

We discovered, that APS sends the authors ORCiDs in their XML files, but we don't extract them. Or at least don't display them in the repository, which we should change if possible.
In the XML files, the orcid comes before the author name in the and it looks like this:

@agentilb @pamfilos