Switch installation source of package QDNAseq

Switch installation source of package QDNAseq from a static cached copy at funet.fi to the live Bioconductor one.

As this package is in Bioconductor only since version 2.14 (which is for R-3.1), the installation is not done using the normal Bioconductor installation method (which for R-3.0 uses Bioconductor 2.13), but instead by manually providing the direct repository url.

(The version previously installed in Chipster, 0.99.4, is essentially the same as 1.0.0, but the current version in Bioconductor repository is 1.0.1, which includes one bugfix.)