Partially completed changes including testing capability in test_cs224s_local.m. Untested and not quite complete!
First attempt at merging incomplete run-on-test code with Paul's save-model code
Added and debugged ability to compute likelihoods on test data
Part of previous commit, adding two more files.
removed train_cs224s_local.m, fixed bug in drdae_obs
Renamed run_experiment.m, created function run_experiment(id)