[module] Add dependency graph.

slides/dunemodule.md

@@ -11,33 +11,13 @@ We all want to implement our own models and create our own test cases.
 But where?
 
 ## The Dune/Dumux Suite
+<img src=img/dependenciesCore.png width="100%">
 
-- dumux
-- dumux-course
-- dune-alugrid
-- dune-common
-- dune-foamgrid
-- dune-geometry
-- dune-grid
-- dune-istl
-- dune-localfunctions
-- dune-subgrid
-- dune-uggrid
-
-## The Dune/Dumux Suite -> Custom Dune Module!
-
-- dumux
-- dumux-course
-- dune-alugrid
-- dune-common
-- dune-foamgrid
-- dune-geometry
-- dune-grid
-- dune-istl
-- dune-localfunctions
-- dune-subgrid
-- dune-uggrid
-- _*my-module*_
+## The Dune/Dumux Suite
+<img src=img/dependenciesOptional.png width="100%">
+
+## The Dune/Dumux Suite
+<img src=img/dependenciesMyModule.png width="100%">
 
 ## How are these models linked?