BibAuthorID: ORCID improvements

* Supports not authenticated user pushing to ORCID.

* Fixes external IDs handling when pushing publications to ORCID.

* Introduces support for long living tokens.

* Amends writing of ORCiD into ORCID.

(superseeds #117)

Signed-off-by: Mateusz Susik <mateusz.susik@cern.ch>
Reviewed-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Reviewed-by: Gilles Louppe <g.louppe@gmail.com>