first part of magnetic field changes

CMakeLists.txt

corsika/detail/framework/core/Cascade.inl

corsika/detail/framework/geometry/Helix.inl

corsika/detail/framework/geometry/Line.inl

corsika/detail/framework/geometry/Sphere.inl

corsika/detail/framework/geometry/Trajectory.inl

corsika/detail/framework/process/ProcessSequence.inl

corsika/detail/framework/utility/QuarticSolver.inl

corsika/detail/media/BaseExponential.inl

corsika/detail/media/FlatExponential.inl

corsika/detail/media/HomogeneousMedium.inl

corsika/detail/media/InhomogeneousMedium.inl

corsika/detail/media/LinearApproximationIntegrator.inl

corsika/detail/media/ShowerAxis.inl

corsika/detail/modules/ObservationPlane.inl

corsika/detail/modules/TrackWriter.inl

corsika/detail/stack/history/HistoryObservationPlane.hpp

corsika/detail/stack/history/HistoryObservationPlane.inl

corsika/framework/core/Cascade.hpp

corsika/framework/core/PhysicalUnits.hpp