Background cosmology neutrinos
Implements neutrinos at the background level. All cosmological quantities are unchanged unless Cosmology:N_ur or Cosmology:N_nu is specified in the parameter file. See theory/Cosmology for details of the calculation.
Only changes outside cosmology.c are
- Replace occurrences of (Omega_m - Omega_b) with Omega_cdm, computed in cosmology.c
- Add a flag space.with_neutrinos to indicate presence of neutrino parts