Add scores_to_probs convenience function
Add Beta-Bernoulli model to C++
Implement lp python bindings for beta bernoulli
Implement beta-bernoulli serialization
Use less-trivial EXAMPLE in beta-bernoulli
Optimize beta-bernoulli score_data
Implement dbg flavor of beta-bernoulli
Fix bugs in dbg flavor of beta-bernoulli
fix merge conflict
fix bnb math
force sample_negative_binomial to return an int