Add package BAS under Bayes Factors, model comparison and Model Averaging header

[merliseclyde]

Would you please consider adding the package BAS under the Application-Specific Package header
Bayes factor/model comparison/Bayesian model averaging:

BAS is a package for Bayesian Variable Selection and Model Averaging in linear and generalized linear models using prior distributions on coefficients from Zellner’s g-prior or mixtures of g-priors.

[jongheepark]

Sure. Thanks.