added explanation to the existence of the is_current flag
added explanation to the existence of the is_current flag

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