ClusterPoisson: Definition of the [ClusterPoisson] class
Description
This class inherits from the [IClusterModelBase] class.
A poisson mixture model is a mixture model of the form:
$$f({x}|\boldsymbol{\theta}) \
=\sum_{k=1}^K p_k \prod_{j=1}^d Pois(x_j;\lambda_{jk}) \
\quad {x} \in {N}^d.$$