[BioC] vsn vignette (was: "matchprobes vignette?")

[Jeff Gentry]

> in fact the .tar.gz file for the vsn package that is linked under
> http://www.bioconductor.org/repository/release1.4/package/html/vsn.html
> also does not contain a vignette. The .zip file, however, does.
> Can you replace the .tar.gz file by one that built correctly?

I actually had just fixed this an hour or so ago, so all should be well.