[x] duplicate Hyperboloid files + update the equation
[x] test it works
[x] add to test suite
[x] update docs
[ ] change to having 'shrinkage' priors on S so that we 'default' to the nested hyperbolic model (ie S=1 unless the data gives us good reason to believe otherwise. Also state this in the docs
S
so that we 'default' to the nested hyperbolic model (ieS=1
unless the data gives us good reason to believe otherwise. Also state this in the docs