[Dune] road map

[Christian Engwer]

Dear all,

there are only few running targets before I can create the next beta
tarballs (see my last mails...).

Please take your time and comment on these things:

1) there are a few open issues regarding the deprecated warnings. If
   nobody objects my proposed solution, I will fix this.
2) DGF section in the grid-howto.
3) example applications in the grid-howto.

Cheers Christian