pos_package: various fixes

* Fixes author name capitalization.

* Removes unused functions.

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
elsevier_package: license information added

* Adds license information.

* Uploads fulltext as type 'INSPIRE-PUBLIC'
  instead of hidden for articles with a 'CC'
  license.

Signe-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
aps_package: DOI harvesting in references fix

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
Reported-by: Kirsten Sachs <kirsten.sachs@desy.de>
elsevier_package: fixes _get_ref

Co-authored-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
Oxford: fix for unpacking method

* Fixes error where variable was used instead of string.
Merge pull request #52 from Dziolas/master

Oxford: fix for unpacking method