Merge branch 'doc/grid' into 'master'

[fix][doc][grid] Use correct gridmanager headers

See merge request !188

exercises/exercise-grids/README.md

@@ -54,10 +54,10 @@ struct Grid<TypeTag, TTag::Injection2pTypeTag> { using type = Dune::YaspGrid<2>;
 
 This sets the Grid, which belongs to the `Injection2pTypeTag` type tag, and calls the manager with a basic `YaspGrid` in the second dimension.
 
-If we look in the grid manager header file,  `dumux/dumux/io/grid/gridmanager.hh`,
+If we look in the grid manager header file, `dumux/dumux/io/grid/gridmanager_yasp.hh`,
 we will see that there are a few grid development options. Until now, we have used the most basic definition.
 
-Let's change our grid manager to a slightly more complicated version. We will still call a YaspGrid, but can use the Dune coordinates system named TensorProductCoordinates rather than the basic version. The following class can be found in `dumux/dumux/io/grid/gridmanager.hh`.
+Let's change our grid manager to a slightly more complicated version. We will still call a YaspGrid, but can use the Dune coordinates system named TensorProductCoordinates rather than the basic version. The following class can be found in `dumux/dumux/io/grid/gridmanager_yasp.hh`.
 
 ```c++
 GridManager<Dune::YaspGrid<dim, Dune::TensorProductCoordinates<ctype, dim> >>
@@ -146,7 +146,7 @@ DuMu$^\mathsf{X}$ can also read in grids from external files. There are two supp
 (see: [Gmsh](http://gmsh.info//) and [Gmsh reference manual](http://gmsh.info//doc/texinfo/gmsh.html))
 
 We can read in simple `.dgf` files using basic YaspGrids, but if we want to use more complicated external grids, we would need to use other grid formats, like `UGGrid` or `ALUGrid`.
-For this example, we can rewrite our Grid Properties to develop an `ALUGrid`. The grid manager class takes the following form:
+For this example, we can rewrite our Grid Properties to develop an `ALUGrid`. The grid manager class (see `dumux/dumux/io/grid/gridmanager_alu.hh`) takes the following form:
 ```c++
 GridManager<Dune::ALUGrid<dim, dimworld, elType, refinementType>>
 ```