various improvements

corsika/corsika.hpp

corsika/detail/framework/geometry/Sphere.inl

corsika/detail/framework/geometry/Trajectory.inl

corsika/detail/media/Universe.inl

corsika/detail/media/VolumeTreeNode.inl

corsika/detail/modules/tracking/TrackingLine.inl

corsika/detail/modules/tracking/TrackingStraight.inl

corsika/detail/stack/NuclearStackExtension.inl

corsika/detail/stack/SuperStupidStack.inl

corsika/framework/core/ParticleProperties.hpp

corsika/framework/geometry/IVolume.hpp

corsika/framework/geometry/Sphere.hpp

corsika/framework/geometry/Trajectory.hpp

corsika/framework/stack/Stack.hpp

corsika/media/Universe.hpp

corsika/media/VolumeTreeNode.hpp

corsika/modules/tracking/Intersect.hpp

corsika/modules/tracking/TrackingLeapFrogCurved.hpp

corsika/modules/tracking/TrackingLeapFrogStraight.hpp

corsika/modules/tracking/TrackingStraight.hpp