Cosserat-Continuum-Nonplanar

@osander: Can you have a look here?

This MR cleans up the usage of MIXED_SPACE in cosserat-continuum.

Now all combinations of dim = dimworld or dim != dimworld and MIXED_SPACE = 0 or MIXED_SPACE = 1 at least compile.

Also, this MR points out the one combination that still can't be solved: Problems with dim != dimworld do not work for MIXED_SPACE = 1!

As soon as I need this for locking tests I will add this; I will have to change Nonplanarcosseratshellenergy so it can be assembled with the GFEMixedAssembler.

src/rod3d.cc

@@ -238,7 +238,7 @@ int main (int argc, char *argv[]) try
 #if HAVE_DUNE_VTK
     using DataCollector = Vtk::LagrangeDataCollector<GridView,order>;
     DataCollector dataCollector(gridView);
-    VtkUnstructuredGridWriter<GridView,DataCollector> vtkWriter(gridView, Vtk::ASCII);
+    VtkUnstructuredGridWriter<GridView,DataCollector> vtkWriter(gridView, Vtk::FormatTypes::ASCII);
 
     // Make basis for R^3-valued data
     using namespace Functions::BasisFactory;