[ENSCORESW-658]. Added subroutine filter_dir to get the lexicographically sorted and filtered content of a directory.
[ENSCORESW-658]. Added subroutine filter_dir to get the lexicographically sorted and filtered
content of a directory.

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