Make chain seed random
Standardise exp and sim data
Update params for standardised data

Make parameter prior live on hypercube, and make data have variance 1.
Change initial condition of chain and proposal var
Remove some print statements
Add some comments
Clip emulator precision by 0.3

This needs to be changed -- we should be able to support Gamma distributions
with bounds as priors
Remove mean term from residual

This may be worth adding back in and treating as optional
Removing an old print statement
Removing setting or total prior bounds

We're doing this already by standardising the inputs to live on the hypercube
Make diag component smaller and remove old printf