[BioC] reposTools: problem with download.packages2

[Jeff Gentry]

> i used the following calls to download all of Windows packages stored
> on the BioC CRAN mirror, but the executions tops with an error report on
> a package (CoCo) only available as source pkg.

Well, it is only avail as a source package. :)

Did the execution halt right there, or did it get all of the packages and
just say that it couldn't get CoCo at the end?  Not sure exactly which
you're describing here.