Merged requested to merge xref_ZFINDesc into feature/xref_sprint
Created by: tgrego
Update to the ZFINDesc parser during the first stage of the xref sprint. See ENSCORESW-2877. Updates were as agreed... no direct file handling, croak on error, null instead of '', linting in general... Parser now using Text::CSV.
no unit tests. Manually tested with zebrafish. Results were consistent.