gnu: Add r-gkmsvm.

* gnu/packages/bioinformatics.scm (r-gkmsvm): New variable.

gnu: Add r-rocr.

* gnu/packages/statistics.scm (r-rocr): New variable.

gnu: Add r-gplots.

* gnu/packages/statistics.scm (r-gplots): New variable.

gnu: Add r-gdata.

* gnu/packages/statistics.scm (r-gdata): New variable.

gnu: Add r-seqgl.

* gnu/packages/bioinformatics.scm (r-seqgl): New variable.

gnu: Add r-chipkernels.

* gnu/packages/bioinformatics.scm (r-chipkernels): New variable.

gnu: Add r-gtools.

* gnu/packages/statistics.scm (r-gtools): New variable.

gnu: Add r-kernlab.

* gnu/packages/machine-learning.scm (r-kernlab): New variable.

gnu: Add r-sfsmisc.

* gnu/packages/statistics.scm (r-sfsmisc): New variable.

gnu: Add r-wgcna.

* gnu/packages/bioinformatics.scm (r-wgcna): New variable.

gnu: Add r-fastcluster.

* gnu/packages/statistics.scm (r-fastcluster): New variable.

gnu: Add r-preprocesscore.

* gnu/packages/statistics.scm (r-preprocesscore): New variable.

gnu: Add r-dynamictreecut.

* gnu/packages/statistics.scm (r-dynamictreecut): New variable.

gnu: Add r-r4rna.

* gnu/packages/bioinformatics.scm (r-r4rna): New variable.

gnu: Add r-spams.

* gnu/packages/statistics.scm (r-spams): New variable.

gnu: Add r-googlesheets.

* gnu/packages/statistics.scm (r-googlesheets): New variable.

gnu: Add r-cellranger.

* gnu/packages/statistics.scm (r-cellranger): New variable.

gnu: Add r-rematch.

* gnu/packages/statistics.scm (r-rematch): New variable.

doc: Suggest installing gvfs.

* gnu/system/examples/desktop.tmpl: Add gvfs to the system-wide list of
packages.

gnu: lv2: Update to 1.14.0.

* gnu/packages/audio.scm (lv2): Update to 1.14.0.