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