added to_string() (for debugging)
added to_string() (for debugging)

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