This tool performs three basic calculations:

1. Computes the number of heterozygotes
2. Computes the ratio between heterozygotes and homozygotes
3. Computes the total number of alleles in the input dataset

This tools is based on vcfhetcount, vcfhethomratio,and vcfcountalleles utilities from the VCFlib toolkit developed by Erik Garrison (https://github.com/ekg/vcflib).