looking at importance sampling wts
Added option to gen rand effs through 2 distribs

One distribution has parameters chosen by the data. The other distribution is independent of the data (N(0,1))
Finished(?) adding option to draw rand effs from two dists
bernoulli cumulant and derivs comp stable
Fixed bernoulli.glmm's cumulant
Changing f~, sampling from 3 distributions.

One distribution has 2 derivs equal to penalized likelihood from pql
Completed changing importance sampling dist (for now?)