add_xref now takes a hash instead  of a list for easy maintainance. Lots of docs and removal of old subroutines. perlcritic fixes.
add_xref now takes a hash instead  of a list for easy maintainance. Lots of docs and removal of old subroutines. perlcritic fixes.

james-monkeyshines/ensembl,willmclaren/ensembl,danstaines/ensembl,Ensembl/ensembl,at7/ensembl,james-monkeyshines/ensembl,james-monkeyshines/ensembl,Ensembl/ensembl,mjg17/ensembl,willmclaren/ensembl,danstaines/ensembl,Ensembl/ensembl,james-monkeyshines/ensembl,mjg17/ensembl,at7/ensembl,danstaines/ensembl,muffato/ensembl,Ensembl/ensembl,at7/ensembl,muffato/ensembl,at7/ensembl,mjg17/ensembl,muffato/ensembl,mjg17/ensembl,muffato/ensembl