Merge branch 'auto-block-size-for-qkdg' into 'master'

Use auto block size deduction for QkDG FEM

See merge request !56

dune/dorie/interface/util.hh

@@ -160,7 +160,7 @@ public:
 	using CON = Dune::PDELab::P0ParallelConstraints;
 	/// GFS type
 	using Type = typename Dune::PDELab::GridFunctionSpace<ES,FEM,CON,
-		Dune::PDELab::ISTL::VectorBackend<Dune::PDELab::ISTL::Blocking::fixed, 1>
+		Dune::PDELab::ISTL::VectorBackend<Dune::PDELab::ISTL::Blocking::fixed>
 	>;
 	/// GFS Constraints Container type
 	using CC = typename Type::template ConstraintsContainer<RF>::Type;