atmosphere ~master (2017-02-14T07:28:57Z)

- gammaLikelihood
`T`gammaLikelihood`(in T shape, in T scale, in T[] sample)` `T`gammaLikelihood`(in T shape, in T scale, in T[] sample, in T[] weights)``T`gammaLikelihood`(in T shape, in T scale, in GammaStatistic!T stat)`Normalized log-likelihood function of the gamma distribution.