Fixed to work with target files with a seq_region_id only. Also added comments to code, and split long lines
Fixed to work with target files with a seq_region_id only. Also added comments to code, and split long lines

Ensembl/ensembl-variation,dbolser-ebi/ensembl-variation,dbolser-ebi/ensembl-variation,willmclaren/ensembl-variation,dbolser/ensembl-variation,dbolser-ebi/ensembl-variation,Ensembl/ensembl-variation,dbolser/ensembl-variation,willmclaren/ensembl-variation,willmclaren/ensembl-variation,dbolser/ensembl-variation,dbolser/ensembl-variation,Ensembl/ensembl-variation,Ensembl/ensembl-variation,willmclaren/ensembl-variation,willmclaren/ensembl-variation,Ensembl/ensembl-variation