added method count_all_by_Slice exists on gene object, now also on transcript object
added method count_all_by_Slice
exists on gene object, now also on transcript object

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