Added --genome and --exclude options

-g or --genome is to supply a PLINK IBD .genome file so you can exclude relateds above some IBD threshold -t

-e or --exclude is to supply a txt list of individuals to exclude from reference for all samples. use case: you already created counts including these "bad" samples and then later you realized those samples are contaminated and you don't want to re-create counts without them but you also don't want to include them in CNV calling