- removed vf clipping in pposgd - that was severely degrading performance on mujoco because it didn’t account for scale of returns
- switched adam epsilon in pposgd_simple
- brought back no-ops in atari wrapper (oops)
- added readmes
- revamped run_X_benchmark scripts to have standard form
- cleaned up DDPG a little, removed deprecated SimpleMonitor and non-idiomatic usage of logger

* Export param noise

* Update documentation

* Final finishing touches