Bug fix: some transcript display_xrefs weren't being assigned correctly if the transcript had more than one associated SwissProt ID and each of the SwissProts was associated with a HUGO ID, e.g. haemoglobin beta/delta chains.

Store synonyms as well as primary xref accessions in get_valid_codes (needed since some HUGOs map to secondary SwissProt IDs)

Moved delete_existing to separate metod so it can be called at the start of the process, so generated xref_ids are more sensible.

Fixed bug causing some gene display_xrefs to be incorrectly assigned.

Removed hardcoded call to slice fetch_by_region to deal with species where 'chromosomes' in microRNA file are actually scaffolds or chunks. Also cache analysis.

add synonyms from the dead names column. NOTE still need to get the Mapper routine to dump non primary xref synonyms

Fixed bug causing query/target identity to not be considered when choosing gene descriptions.

Do not copy via a specific host (as these now have a max 256 process per user limit). This may be slower than the direct use of a named host (with the nfs directly hanging of it) but will work