Merge branch 'bugfix/return-type-in-functionintegratortest' into 'master'

Use correct return type when creating grid

See merge request !93

dune/fufem/test/functionintegratortest.cc

@@ -146,7 +146,7 @@ struct FunctionIntegratorTestSuite
 };
 
 template<class GridType>
-GridType* constructCoarseUnitSquareGrid()
+auto constructCoarseUnitSquareGrid()
 {
     const int dim=2;
     typename Dune::GridFactory<GridType> gridFactory;