Merge branch 'feature/mixeddimension' into 'next'

dumux/CMakeLists.txt

dumux/implicit/cellcentered/localjacobian.hh

dumux/implicit/localjacobian.hh

dumux/implicit/properties.hh

dumux/implicit/propertydefaults.hh

dumux/linear/CMakeLists.txt

dumux/linear/linearsolveracceptsmultitypematrix.hh

dumux/material/fluidsystems/h2oair.hh

dumux/mixeddimension/CMakeLists.txt

dumux/mixeddimension/assembler.hh

dumux/mixeddimension/bulklocaljacobian.hh

dumux/mixeddimension/embedded/CMakeLists.txt

...imension/embedded/cellcentered/bboxtreecouplingmanager.hh

...on/embedded/cellcentered/bboxtreecouplingmanagersimple.hh

...x/mixeddimension/embedded/cellcentered/pointsourcedata.hh

dumux/mixeddimension/embedded/start.hh

dumux/mixeddimension/glue/CMakeLists.txt

dumux/mixeddimension/glue/glue.hh

dumux/mixeddimension/integrationpointsource.hh

dumux/mixeddimension/lowdimlocaljacobian.hh