added a sub_Slice method, that returns a smaller slice. This will not make use of the cached features of the parent slice though
added a sub_Slice method, that returns a smaller slice. This will not make use of the cached features of the parent slice though

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