[Rivet] normalisation to cross-sections

[Hendrik Hoeth]

Thus spake Andy Buckley (andy.buckley at ed.ac.uk):

> And I think with a concerted effort this can happen very fast after
> the 1.2.0 release... so let's get 1.2.0 out asap, with the same histo
> behaviour as we intend all versions to have, and get working on this
> histo upgrade immediately after.

I fully agree with this plan (I'm not a fan of that histogram scaling
either, but at least it doesn't involve unneeded cross-sections anymore).

> Checking out YODA and testing the statistics of the histo combination,
> getting the I/O to work, etc. would be a BIG step in the right
> direction.

So can you conduct that concert, please? At least _I_ don't know what to
do and where to start with YODA, but I see that it is important for us.

    Hendrik

-- 
"You have to take the most direct road to go instead of your
 meeting, you have to, this one ended, leave at once the CERN
 domain."         (imprint on the CERN visitor ID cards)