[Gemc_software] gemc version 1.7

[Maurizio Ungaro]

Hello all,

GEMC is updated to in the repository (revision 6484) and at JLAB. Here's the list of the main changes:

* EVIO V4 support
* Materials factories: 
  GEMC supports two ways if declaring materials: the CPP factory (identical to what we had before) and the MYSQL factory.
  The MYSQL factory now includes optical properties.
* Parameters Factories: 
  This factory stores the geometry parameters and make them available to the reconstruction routines.
  This factory currently supports MYSQL, and it will be extended to support CCDB and CLARA geometry services (as plugins).
* A 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.


Furthermore these libraries have been updated at JLAB:

* EVIO > EVIO4
* Geant4 > 9.5.p01
* QT:  4.8.1

Let me know if you have questions/comments.

Best,
Mauri