Added a useful comment for future code archaeologists.
Added a useful comment for future code archaeologists.

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