Changes so seq_region_length is set when creating slices
Changes so seq_region_length is set when creating slices

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