good_bb_obj: Objective function for non-outlier model
In dcgerard/updogAlpha: Using Parental Data for Offspring Genotyping

Objective function for non-outlier model

1	good_bb_obj(rho, ocounts, osize, theta, avec, pk)

`rho`	The overdispersion parameter.
`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.
`theta`	A vector of proportions. The posterior probabilities of each point being ok.
`avec`	The current slice of `q_array`.
`pk`	The parameterspace.