add constructor argument to set cluster weights in supercluster sampler: unit weight or variable weight
Merge branch 'mrjobify' of github.com:mit-probabilistic-computing-project/Cloudless into mrjobify
crp_init_superclusters(): correct which seed is passed into sample_from_dirichlet_multinomial
add crp_init_superclusters_experimental: uniformly distribute data among superclusters and crp init with parent alpha on each supercluster
use crp_init_superclusters_experimental in initialization