[Rivet] Problem with installation

[Frank Siegert]

Dmitry Popov, Wednesday 04 November 2009:
> > cat /etc/redhat-release
> Scientific Linux SL release 4.5 (Beryllium)
> 
> > cat /etc/redhat-release
> Scientific Linux CERN SLC release 5.4 (Boron)

Ok, that's exactly what I wanted to find out... on my SL5 it reads:

  Scientific Linux SL release 5.3 (Boron)

so now we understand the 
  "ValueError: invalid literal for int(): (Beryllium)"

I guess we can't rely on such a fragile parsing of redhat-release, but 
have to find a more reliable solution. Andy, why did you comment out the 
"lsb_release" way? Did that not work on yet another variation of SL(C), 
the famous scientific OS which doesn't have a native gsl package?

Frank