open-source explicit reproducibility instructions

> @dustinvtran
> We have the exact Bash commands to launch jobs with Google's cloud cluster in order to reproduce all results. There's nothing particularly notable about them as all the best hparams are default flag values or footnotes in the README.md's. Howevever, it would be nice to open-source a version of these instructions in order to be explicit---bordering on pedantic. More clarity helps!
>
> @znado mentioned Tensorboard.dev. That could be a great way to open-source the exact runs we use for our tuning jobs and the runs we use to report results in the tables.

https://github.com/google/edward2/issues/222