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.

dune.module

@@ -8,4 +8,4 @@ Version: svn
 Maintainer: oliver.sander@tu-dresden.de
 #depending on
 Depends: dune-common(>=2.7) dune-grid(>=2.7) dune-uggrid dune-istl dune-localfunctions dune-geometry (>=2.7) dune-functions (>=2.7) dune-solvers dune-fufem dune-elasticity (>=2.7)
-Suggests: dune-foamgrid dune-parmg dune-vtk dune-curvedgrid
+Suggests: dune-foamgrid dune-parmg dune-vtk dune-curvedgeometry