* Fix segementation fault in Gaspard when gamma-rays are fired

   + Clear for map scorers was misplaced at the end of all ReadSensitive()
     methods in GaspardTracker* shapes.
   + The same applied for the DetectorNumber_itr++ statement
   + The line Energy_itr = EnergyHitMap->GetMap()->begin(); was missing
     when looping on the energy map.

* Strip numbers are now integer instead of double