Modified to be able to harvest from Consyn

*contrast_out_utils.py
*elsevier_package.py
*elsevier_package.py: Fixes on _build_journal_mappings function
*elsevier_package.py: Fixes on get_references function
*elsevier_package.py: Import fixes
*elsever_package.py: Fixes in get_publication_information
Merge pull request #1 from GiorgosPa/consyn-harvest

Modified to be able to harvest from Consyn
elsevier_package: fixes on _add_references function

* Adds a new case for the label harvesting to remove
  the ending parenthesis.
elsevier_package: fix bad os call
Fixes imports and requirements

* setup: now also installs the requirements
  from requirements.txt
* elsevier_package: fixes imports
* requirements: adds a file to specify requirements
Merge pull request #3 from GiorgosPa/consyn-harvest

elsever_package.py: Fixes on _add_references function
Merge pull request #4 from GiorgosPa/import-fixes

Fixes imports and requirements
elsevier_package: Various fixes for CONSYN harvesting

* ignores license
* fixes date harvesting
* fixes issue harvesting
* fixes journal name
* fixes reference harvesting for book-series
  and conferences
Merge pull request #5 from GiorgosPa/author-harvesting

elsevier_package: Various fixes for CONSYN harvesting
elsevier_package: fixes reference harvesting for CONSYN

* adds a case for book references
* fixes exception handling
Merge pull request #6 from GiorgosPa/author-harvesting

elsevier_package: fixes reference harvesting for CONSYN
elsevier_package: fixes pep8 issues
Merge pull request #7 from GiorgosPa/author-harvesting

elsevier_package: fixes pep8 issues
elsevier_package: fixes on date and volume harvesting for CONSYN
Merge pull request #8 from GiorgosPa/date-volume

elsevier_package: fixes on date and volume harvesting for CONSYN
elsevier_package: adds FFT marc field to upload fulltexts for consyn
Merge pull request #9 from GiorgosPa/add-FFT

elsevier_package: adds FFT marc field to upload fulltexts for consyn
aps_package: add APS conversion package

* Adds a new package to convert aps harvested files to
  MARCXML format.

Tested-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
aps_package: various fixes

* Updates the script to not add the FFT tag.

* Adds a new case for reference harvesting with no
  'mixed-citation' tag.

* Adds a new case for proc-type references.

* Adds a new case for thesis-type references.

* Adds a new case for report-type references.

* Fixes _get_doi function.

* Handles multiple references with the same label

Signed-off by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
aps_package: fix reference extraction

* Handles unstructured text in references.

* Adds external links in references.

* Kwalitee fixes.

* Adds a special case to handle references
  from journal 'J.High Energy Phys.'.

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