If the flag is set to true, we use in the DumpReplayer the default
MultiLayerModel. In case the user uses another model, one must asks the
user's model for debug purpose.
The dump files were updated to add the atmospheric refraction flag in
the direct loc and inverse loc lines.

We should now avoid dumping the same data several time (in sensors LOS,
datation and rate), and we use linear interpolation on replay between
the dumped LOS, datation and rates.

The replay does not work correctly for now (the unit test fails), so
this needs more work.