v0.9.0

NIMBLE is an R package for hierarchical statistical modeling (aka
graphical modeling). It enables writing general models along with
methods such as Markov chain Monte Carlo (MCMC), particle filtering
(aka sequential Monte Carlo), and other general methods.

This release adds a new SMC algorithm, fixes some bugs in existing
SMC algorithms, improves the speed of MCMC configuration, and fixes
a variety of bugs.