Use a zotero generated json instead of crossref api

Advantage :

• The zotero DB can be cleaned easily
• we can add abstract easily
• no api crossref requests

Drawback :

• manual steps
• need to be up to date

Example of json Zotero table with most of the articles used in the wiki Wiki.json

created branch zotero-generated-json to address this issue

mentioned in merge request !8 (merged)

mentioned in commit 90f52fd0

closed with merge request !8 (merged)