- add VectorEnvWrapper and VectorEnvNormObs - obs_rms store in policy save/load - align mujoco scripts with atari: obs_norm, envpool, wandb and README
- rename WandBLogger -> WandbLogger - add save_data and restore_data - allow more input arguments for wandb init - integrate wandb into test/modelbase/test_psrl.py and examples/atari/atari_dqn.py - documentation update