[Rivet] [Professor] RivetProfessor Virtual Machine

[Daniel Weyh]

Ooops, simply deleted my src directory to free space.

Added Rivet analyses definitions again, and Pythia8 as you posted.

I'll wait for tomorrow or something... and will upload the corrected version then 
(maybe some more comments are given by then).

> Thanks for all your work!
No problem.
All of you had much more work to create the nice software I simply bundle...
So I can at least try to contribute something that I'm able to do.

Cheers,
Daniel