DumpToRayFile runs photons through detector

[hamogu]

According to the docs, the source properties shall be fixed in a ray file, but all the spacecraft stuff (dither, grating, detector) should only happen when the ray file is used with SourceType=RAYFILE. However, that's currently not the case:

Starting simulation.  Exposure Time set to 1.000000e+04 seconds
Collecting 100000 photons...
    68266 collected.
Reflecting from HRMA
Detecting with ACIS-S

Dumping to RayFile marx.output...

When I then use marx.output as input, I get always the same results, independent of the detector I use in that run.

Probably related: sky_ra.dat and sky_dec.datare not written, so the output cannot be used withmarx2fits.

[hamogu]

I have a RAYFILE test in the marxtest in source.py but that can only be activated after the two problems mentioned above are fixed.