Cosmology_init(integer(IN) :: myPE, logical(IN) :: restart)
Initialize unit scope variables which are typically the runtime parameters. This must be called once by Driver_initFlash.F90 first. Calling multiple times will not cause any harm but is unnecessary.
myPE -- local processor number restart -- note if we are restarting. NOTE From a "cold start" this unit has to determine the cosmological scaling and will solve the Friedmann equations to do so. On a restart, the correct values will be read from the checkpoint file