up_obj: The objective function
In dcgerard/updogAlpha: Using Parental Data for Offspring Genotyping

The objective function

1 2	up_obj(pival, p1geno, p2geno, alpha, beta, ocounts, osize, dbinommat, qarray, r1vec, r2vec)

`pival`	A proportion. The probability of not being a mistake.
`p1geno`	The genotype of parent 1
`p2geno`	The genotype of parent 2
`alpha`	The alpha parameter in `dbetabinom`.
`beta`	The beta parameter in `dbetabinom`.
`ocounts`	A vector of non-negative integers. The ith element is the number of reads of the reference allele in the ith child.
`osize`	A vector of positive integers. The ith element is the total number of reads for the ith child.
`dbinommat`	A matrix. The rows index the genotype and the columns index the offspring. These are the binomial probabilities of the count given the genotype.
`qarray`	An three-way array of proportions. The (i, j, k)th element is the probability of an offspring having k - 1 reference alleles given that parent 1 has i - 1 refrerence alleles and parent 2 has j - 1 reference alleles. Each dimension of the array is `ploidy + 1`.
`r1vec`	A vector of prior probabilities whose ith element is the prior probability that parent 1 has i -1 copies of allele A.
`r2vec`	A vector of prior probabilities whose ith element is the prior probability that parent 2 has i -1 copies of allele A.