Refactored logic for set-filter
Refactored logic for set-filter

CuppenResearch/bioruby-vcf,CuppenResearch/bioruby-vcf,gusevfe/bioruby-vcf,gusevfe/bioruby-vcf,pjotrp/bioruby-vcf,CuppenResearch/bioruby-vcf,pjotrp/bioruby-vcf,gusevfe/bioruby-vcf,pjotrp/bioruby-vcf