Merge branch 'doc/staggered' into 'next'

dumux/assembly/staggeredlocalassembler.hh

dumux/common/properties.hh

dumux/discretization/staggered/elementfacevariables.hh

dumux/discretization/staggered/elementfluxvariablescache.hh

dumux/discretization/staggered/elementvolumevariables.hh

dumux/discretization/staggered/facesolution.hh

dumux/discretization/staggered/freeflow/boundarytypes.hh

dumux/discretization/staggered/freeflow/connectivitymap.hh

dumux/discretization/staggered/freeflow/facevariables.hh

dumux/discretization/staggered/freeflow/fourierslaw.hh

dumux/discretization/staggered/freeflow/maxwellstefanslaw.hh

dumux/discretization/staggered/freeflow/properties.hh

...cretization/staggered/freeflow/staggeredgeometryhelper.hh

...discretization/staggered/freeflow/subcontrolvolumeface.hh

dumux/discretization/staggered/freeflow/velocityoutput.hh

dumux/discretization/staggered/fvelementgeometry.hh

dumux/discretization/staggered/fvgridgeometry.hh

dumux/discretization/staggered/gridfacevariables.hh

dumux/discretization/staggered/gridfluxvariablescache.hh

dumux/discretization/staggered/gridvariables.hh