BinomialMixtures: Construct a poset of binomial mixture models.
Description
Creates an object representing a collection of binomial mixture models. There
is one model for each fixed number of components from 1 to some specified
maximum. In particular each model is identified by a single number
specifiying the number of components in the model. Models are naturally
ordered by inclusion so that, for example, a model with 2 components comes
before a model with 3 or more components.