moved EM parameter definition from SetCuts to ConstructProcess
add optional hadronic GFlash to any Physics List
add optional hadronic GFlash to any Physics List
removed unused obsolete headers (real classes are inside SimGeneral/GFlash)
added CLHEP header
use local variable for vector size
use local
Add const
Merge pull request #6921 from civanch/bremsstrahlung_th

Moved G4 EM parameter definition from SetCuts() to ConstructProcess()