item.fromJSON sets the libraryID for the exported items to Zotero.Libraries.userLibraryID by default and once set it can't be changed. Therefore, exporting would fail for citations from items not in the user's default library (ie. in group libraries).
Fixes #216
item.fromJSONsets the libraryID for the exported items toZotero.Libraries.userLibraryIDby default and once set it can't be changed. Therefore, exporting would fail for citations from items not in the user's default library (ie. in group libraries).