Bumped version to 0.4RC2.
BUG: progressbar does not seem to be working. Set to default to False.
DOC: Bumped version to 0.4RC3.
MIN: Added assertion that depends_on must be a dict.
BUG: approx_map() was failing on non-scalar outputs.
Bumped verison to 0.4RC3.
Bumped version to 0.4
ENH: Hierarchical models are now pickable.
TST: Added unittest for loading and saving.
Bumped version to 0.4.1
REF: Rewrote gen_rand_data to take python function instead of stochastic.
ENH: values passed to observed nodes are recarrays
BUG: Group_only_nodes was not set by default
Merge pull request #21 from hddm-devs/refactor_generate

REF: Rewrote gen_rand_data to take python function instead of stochastic
merging master and develop
BUG: Fixed bugs resulting from changing gen_rand_data interface.
REF: load_csv() and save_csv() now call pandas functions under the hood.
BUG: index of generated data is corrected
Merge pull request #22 from hddm-devs/adding_opt

Adding opt
BUG: quick (and wrong) fix to generate_data argument