[Rivet] rivet updates

[Frank Krauss]

Dear Rivet authors
checking the analyses in my recently downloaded and installed rivet 
version I have the feeling that a number of analyses that the 
experiments already have provided are actually missing.
As a suggestion: Wouldn't it be good to provide more regular updates, 
maybe monthly or quarter-yearly, even if it just one extra analysis that 
gets caught?
Thanks a lot
     Frank