def tag h
      h2 = h.dup
      [:show_help,:skip_header,:verbose,:quiet,:debug].each { |key| h2.delete(key) }
      info = h2.map { |k,v| k.to_s.capitalize+'='+'"'+v.to_s+'"' }.join(',')
      line = '##BioVcf=<'+info+'>'
      @lines.insert(-2,line)
      line
    end
def tag h
      h2 = h.dup
      [:show_help,:skip_header,:verbose,:quiet,:debug].each { |key| h2.delete(key) }
      info = h2.map { |k,v| k.to_s.capitalize+'='+'"'+v.to_s+'"' }.join(',')
      line = '##BioVcf=<'+info+'>'
      @lines.insert(-2,line)
      line
    end
Push a special key value list to the header