changes from code review implemented. Principally the reduction of some...

changes from code review implemented. Principally the reduction of some duplicated code. Also for the generation of display_xref_ids do not use those where the display_label is just a number. Also perl -w now runs with no warnings. Ah yes and also the triage stuff is now done right at the end as this was done before the pair calculation before which made writing the xrefs for the pairs more complicated than was needed.