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
edpsciences_package: adds new module

* Converts the metadata from edpsciences
  to marc xml.

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
tests: unit test suite added

* Adds unit tests for PoS, APS, CONSYN and EDP Sciences.

* Unifies the harvesting of EDP Sciences and APS.

* Amends setup.py to include test data to the instalation.

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
jats_package: new module for jats parsing added.

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
edpsciences_package: convertion fixes

* Adds 980__a:ConferencePaper.

* Adds reference numbers.

* Adds licence harvesting.

* Removes footnotes from title and places
  them to 500__a field. Adds subtitle harvesting.

* Adds subject harvesting.

* Adds keywords harvesting.

* Adds harvesting of article type and only converts articles
  with types 'research-article', 'introduction', 'letter'.

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>