Effective sample size not available

[riddell-stan]

Make effective sample size is available via stan::analyze::compute_effective_sample_size (via httpstan).

[riddell-stan]

@mjcarter95 Any updates on ess? Would be great to get this in.

[mjcarter95]

Sorry for the slow progress on this @riddell-stan, I've been busy with PhD related work recently and not had much spare time to push this forwards.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.