------------------- - fix row updating in hmm hdf5 data_overview
2.0.53
------------------- - Add method of imposing constraints on PoissonHMM both directly and via HmmHandler - Fix bug in how HMMs are saved
2.0.52
------------------- - MAJOR BUX FIX: fix in HMM EM algorithm. Transition matrix was being improperly normalized - Now log likelihood is being properly computed and effectively used as a convergence criteria for HMMs
2.0.51
------------------- - small edit to get_hmm_spike_data so that you can pass it a unit_type keyword or a list of units - also added area parameter for HMM handler so cells from other brain areas can be ignored
2.0.50
------------------- - fix hmm_id assignment for new HMMs after deleting HMMs
2.0.49
------------------- - fixed delete_hmm so that it properly compares strings when choosing which hmm to delete