Update eukaryota.pm
Update eukaryota.pm

Added method documentation to explains why they get overridden
muffato/ensembl,mjg17/ensembl,Ensembl/ensembl,mjg17/ensembl,mjg17/ensembl,muffato/ensembl,Ensembl/ensembl,at7/ensembl,james-monkeyshines/ensembl,danstaines/ensembl,james-monkeyshines/ensembl,muffato/ensembl,at7/ensembl,Ensembl/ensembl,muffato/ensembl,at7/ensembl,james-monkeyshines/ensembl,danstaines/ensembl,danstaines/ensembl,Ensembl/ensembl,at7/ensembl,james-monkeyshines/ensembl,mjg17/ensembl