added reference strain in the get_all_Slices call
added reference strain in the get_all_Slices call

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