xray functions for lightcone
Merge the x-ray snapshot functionality in src/extra_io/EAGLE with the lightcone branch. In the lightcone code, the relevant x-ray functions are called, similar to how it is done for the snapshots.
Merge the x-ray snapshot functionality in src/extra_io/EAGLE with the lightcone branch. In the lightcone code, the relevant x-ray functions are called, similar to how it is done for the snapshots.