[Rivet] CMS RIVET analyses

[Frank Siegert]

Hi Andy, all,

> * Lastly, something on which we'll maybe need input from other Rivet
> developers: you're using explicitly FastJet3 functionality to groom the
> jets. That's great: you've written the first official experiment Rivet
> analysis to require FJ3! But it means that we will need to require FJ3
> for any Rivet version which includes this analysis... which we currently
> don't do. I think we can happily do that for Rivet version 2, but
> perhaps it's not the best idea to make that change in our last ever 1.x
> minor version.
>
> I suggest that we release Rivet 1.x with the existing FJ > 2.x
> requirement, and also make your analysis code public on the Rivet
> website for FJ3 users to build. Or we could make a special exception and
> build the analysis only if FJ2 is present: that might be the neatest
> option.

Agreed, that sounds like a good option and one that should be doable
easily within the Makefile.am, right?

> For Rivet 2.0.1 we can make FJ3 a build requirement: I think it
> is time for that anyway,

Fine with me.

Cheers,
Frank