programs for use in ggd

 Takes a genome file and (currently) a .vcf.gz or
 a .bed.gz and checks that:
 .
     * a .tbi is present
     * the VCF has ""##fileformat=VCF" as the first
     line
     * the VCF has a #CHROM header
     * the chromosome are in the order specified by
     the genome file (and present)
     * the positions are sorted
     * the positions are <= the chromosome lengths
     defined in the genome file.
 .
 As a result, any new genome going into GGD will have
 a .genome file that will dictate the sort order
 and presence or absence of the 'chr' prefix for chromosomes