Merge branch 'random_iterator' into 'master'

corsika/detail/framework/random/RNGManager.inl

.../detail/framework/random/random_iterator/RandomIterator.h

corsika/detail/framework/random/random_iterator/Stream.hpp

...detail/framework/random/random_iterator/detail/Engine.hpp

.../framework/random/random_iterator/detail/EngineTraits.hpp

...a/detail/framework/random/random_iterator/detail/Macros.h

...ork/random/random_iterator/detail/Random123/MicroURNG.hpp

...andom/random_iterator/detail/Random123/ReinterpretCtr.hpp

...l/framework/random/random_iterator/detail/Random123/aes.h

...framework/random/random_iterator/detail/Random123/array.h

...l/framework/random/random_iterator/detail/Random123/ars.h

...ork/random/random_iterator/detail/Random123/boxmuller.hpp

.../random_iterator/detail/Random123/conventional/Engine.hpp

...random_iterator/detail/Random123/conventional/gsl_cbrng.h

...random_iterator/detail/Random123/features/clangfeatures.h

...dom_iterator/detail/Random123/features/compilerfeatures.h

...m/random_iterator/detail/Random123/features/gccfeatures.h

...m/random_iterator/detail/Random123/features/iccfeatures.h

...random_iterator/detail/Random123/features/metalfeatures.h

.../random_iterator/detail/Random123/features/msvcfeatures.h