First MESA 6596 push

Big push (long time coming!). Currently has any inlist tweaks necessary
for compliance with 6596 (minor, if any). More importantly, the
run_star_extras and inlist parameters are setup for a constant Mdot,
for post-update testing and comparisons. Each of the models was run on
the new MESA with the variable Mdot first, but the initial conditions
(other than age) were unchanged from previously committed inlists.