Propose a new live point by sampling *uniformly* within
        the union of ellipsoids.

Update the random walk proposal scale based on the current
        number of accepted/rejected steps.

Update the slice proposal scale based on the relative
        size of the slices compared to our initial guess.

Update the Hamiltonian slice proposal scale based
        on the relative amount of time spent moving vs reflecting.

Code and Methods:
================
Speagle (2019): ui.adsabs.harvard.edu/abs/2019arXiv190402180S

Nested Sampling:
===============
Skilling (2004): ui.adsabs.harvard.edu/abs/2004AIPC..735..395S
Skilling (2006): projecteuclid.org/euclid.ba/1340370944

Bounding Method:
Feroz, Hobson & Bridges (2009): ui.adsabs.harvard.edu/abs/2009MNRAS.398.1601F

Sampling Method: