new test structure to make "make test" work correctly

CMakeLists.txt

dune/CMakeLists.txt

dune/fem-dg/CMakeLists.txt

dune/fem-dg/examples/CMakeLists.txt

dune/fem-dg/examples/Makefile.am

dune/fem-dg/examples/advdiff/CMakeLists.txt

dune/fem-dg/examples/advdiff/main.cc

dune/fem-dg/examples/advdiff/models.hh

dune/fem-dg/examples/advdiff/problemcreator.hh

dune/fem-dg/examples/advdiff/problems.hh

dune/fem-dg/examples/advdiff/problems/deformationalflow.hh

dune/fem-dg/examples/advdiff/problems/problem.hh

dune/fem-dg/examples/advdiff/problems/problemQuasiHeatEqn.hh

dune/fem-dg/examples/advdiff/problems/pulse.hh

dune/fem-dg/examples/advdiff/problems/sin.hh

dune/fem-dg/examples/advdiff/test/CMakeLists.txt

dune/fem-dg/examples/advdiff/test/parameter.in

dune/fem-dg/examples/advdiff/test/parameter2.in

dune/fem-dg/examples/advdiff/test/parameter_cmake

dune/fem-dg/examples/dataio/CMakeLists.txt