Issue #36 | clarify filter syntax
Issue #36 | clarify filter syntax

vcflib/vcflib,ekg/vcflib,vcflib/vcflib,ekg/vcflib,vcflib/vcflib,ekg/vcflib,ekg/vcflib,vcflib/vcflib,ekg/vcflib,vcflib/vcflib,vcflib/vcflib,vcflib/vcflib,vcflib/vcflib