Merge branch '48_particle_creator' into 'master'

Framework/ProcessSequence/ProcessSignature.h

Framework/ProcessSequence/testProcessSequence.cc

Framework/Random/ExponentialDistribution.h

Framework/Random/RNGManager.cc

Framework/Random/RNGManager.h

Framework/Random/UniformRealDistribution.h

Framework/Random/testRandom.cc

Framework/StackInterface/CMakeLists.txt

Framework/StackInterface/ParticleBase.h

Framework/StackInterface/Stack.dox

Framework/StackInterface/Stack.h

Framework/StackInterface/StackIteratorInterface.h

Framework/StackInterface/testStackInterface.cc

Framework/Units/testUnits.cc

Framework/Utilities/Bit.h

Framework/Utilities/COMBoost.cc

Framework/Utilities/COMBoost.h

Framework/Utilities/CorsikaFenv.h

Framework/Utilities/CorsikaFenvDefault.cc

Framework/Utilities/CorsikaFenvFallback.cc