[Rivet] Plots normalized to cross section

[Hendrik Hoeth]

Thus spake Peter Skands (peter.skands at cern.ch):

> To clarify, Stefan is not asking to *replace* the current histograms
> by ones normalized to unity, but it could be a nice additional
> feature if one could get histograms normalized to unity *in
> addition* to the dimensionful ones.

As I said: rivet-rescale does that for you.

-- 
It pays to be obvious, especially if you have
a reputation for subtlety.    -- Isaac Asimov