added handling for JAGS style initial values list of lists
added handling for JAGS style initial values list of lists

nimble-dev/nimble,NLMichaud/nimble,NLMichaud/nimble,nimble-dev/nimble,nxdao2000/nimble,nxdao2000/nimble,nimble-dev/nimble,nimble-dev/nimble,nimble-dev/nimble,NLMichaud/nimble,NLMichaud/nimble,nxdao2000/nimble,nxdao2000/nimble