Added journal-issn mappings collected from http://cdsweb.cern.ch/. Removed 'limit' option which was not necessary (building mappings is fast).
Added journal-issn mappings collected from http://cdsweb.cern.ch/.
Removed 'limit' option which was not necessary (building mappings is fast).

tiborsimko/invenio-formatter,tiborsimko/invenio-formatter,tiborsimko/invenio-formatter,inveniosoftware/invenio-formatter,inveniosoftware/invenio-formatter,inveniosoftware/invenio-formatter