added support for multiline posterior expressions in conjugacy system
added support for multiline posterior expressions in conjugacy system

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