Paper submission checklist

[reubenharry]

• fix figure
• attempt to update work appendix
• get grid-optimal results
  • start runs
• replicate results in new repo
  • 64 bit precision with inference gym: Inference-Gym: double precision issue tensorflow/probability#1993
  • ground truth estimates (Neal's Funnel? Rosenbrock?)
  • replication problems: Neal's Funnel
• debug slowness of tuning:
  • identify cost site: bad L initialization is at least one
• fix claim in appendix that we use inference gym models: specifically untrue for stochastic volatility