Merge branch 'develop' of geraldine.fjfi.cvut.cz:/local/projects/tnl/tnl into develop

Conflicts:
	examples/advection/LaxFridrichs_impl.h
	examples/inviscid-flow/1d/LaxFridrichsContinuity_impl.h
	examples/inviscid-flow/1d/LaxFridrichsEnergy_impl.h
	examples/inviscid-flow/1d/LaxFridrichsMomentum_impl.h
	examples/inviscid-flow/2d/EulerPressureGetter_impl.h
	examples/inviscid-flow/2d/EulerVelGetter_impl.h
	examples/inviscid-flow/2d/EulerVelXGetter_impl.h
	examples/inviscid-flow/2d/EulerVelYGetter_impl.h
	examples/inviscid-flow/2d/LaxFridrichsContinuity_impl .h
	examples/inviscid-flow/2d/LaxFridrichsEnergy_impl.h
	examples/inviscid-flow/2d/LaxFridrichsMomentumX_impl.h
	examples/inviscid-flow/2d/LaxFridrichsMomentumY_impl.h
	src/TNL/Meshes/GridDetails/Grid2D_impl.h
	src/TNL/Meshes/GridDetails/NeighbourGridEntitiesStorage.h
	src/TNL/Meshes/GridEntity.h
	src/TNL/Meshes/GridEntityConfig.h
	src/TNL/Operators/NeumannBoundaryConditions.h