[Gemc_software] Mirrors SD

[Maurizio Ungaro]

Hi all,

a new Sensitive Detector,   "Mirrors" has been added. "Mirrors" has the FLUX associated hit process routine.
This will allow mirrors to use identifiers w/o recording the unnecessary hits on them.

By default it will not record the particles hitting unless -RECORD_MIRRORS=1 is set.

You can now replace FLUX with Mirrors to get this behavior.

Cheers,
Mauri