Stats of gff3 files

Examples:

statsongff3 --precision 1000 Homosapiens.GRCh38.109.chromosome.1.gff3 Homosapiens.GRCh38.dna.chromosome.1.fa 2>err

statsongff3 --all Homosapiens.GRCh38.109.chromosome.1.gff3 Homosapiens.GRCh38.dna.chromosome.1.fa 2>err

zcat Cionasavignyi.CSAV2.0.dna.toplevel.fa.gz | statsongff3 --precision 100 Cionasavignyi.CSAV2.0.109.gff3 stdin 2> err