Major changes to estimate.dispersion and related functions. Users can now choose different predictors (from pi, mu or row sum) and can fit different dispersion to each group separately.
Before adding fit.nb.glm.1, fit.nb.glm.1u, fit.nb.glm.
added fit.nb.glm.1 fit.nb.glm.1u
rename ll.nb to l.nb
added alias.R