[Dune] Update of the official Homepage / dunedesign.png

[Christoph Grüninger]

Dear all,
this is the way I see Dune:


                            applications

-------------------------------
|                              |
|   3rd party base modules     |
|                              |
|              --------------------------------------
|              |                                    |
|              |      discretization modules        |
|              |                                    |
------------------------------------------------------------------
|                                                                |
|                         core modules                           |
|                                                                |
------------------------------------------------------------------

This emphasizes that applications can be built on top of every step.

Please add dune-localfunctions as a core module, see FS#913. Maybe you 
have to reduce the horizonal box size.

I second Markus that the current draft has to many grid modules in the 
chart. How about adding Kaskade7 and DuMuX as external libraries? They 
are frameworks developled by external users and not "only" grids. Maybe 
change multidomaingrid to multidomain?

I volunteer for every job related to HTML and web standard compliance.

Have a nice day
Christoph