Added circular_seq and external_db attributes
Added circular_seq and external_db attributes

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