DOC: Sketch Bernoulli mixture example
ENH: Add random sampling function for Bernoulli distribution
ENH: Accept boolean array when testing whether an array is integer array
BUG: Allow maximum number of successes to be observed in Binomial
ENH: Fix constructor for Bernoulli node
TST: Add unit tests for the fixed bugs in Bernoulli and Binomial
ENH: Add random sampling from the Dirichlet distribution
TST: Add unit tests for Dirichlet random sampling
ENH: Implement random sampling to Dirichlet and Beta nodes
TST: Add unit tests for random sampling of Beta nodes
ENH: Implement message to parent from Binomial node
DOC: Add code to the Bernoulli mixture example