gnu: epiphany: Update to 3.18.2.
* gnu/packages/gnome.scm (epiphany): Update to 3.18.2.
gnu: webkitgtk: Update to 2.10.4.
* gnu/packages/webkit.scm (webkitgtk): Update to 2.10.4.
doc: Document network-manager-service.
* doc/guix.texi (Networking Services): Document network-manager-service.
doc: Add elaborate package search example.
* doc/guix.texi (Invoking guix package): Add elaborate --search example
using recsel and sexes.
gnu: Add Pfff.
* gnu/packages/textutils.scm (pfff): New variable.
emacs: Display supported systems in "Package Info".
* emacs/guix-main.scm (%package-param-alist): Add 'systems'.
* emacs/guix-ui-package.el (guix-package-info-insert-systems): New
procedure.
(guix-package-info-format): Add it.
(guix-output-info-format): Likewise.
(guix-package-info-titles): Add "Supported systems" title.
gnu: Add genomation.
* gnu/packages/bioinformatics.scm (r-genomation): New variable.
gnu: Add seqPattern.
* gnu/packages/bioinformatics.scm (r-seqpattern): New variable.
gnu: Add impute.
* gnu/packages/bioinformatics.scm (r-impute): New variable.
gnu: Add BSgenome.
* gnu/packages/bioinformatics.scm (r-bsgenome): New variable.
gnu: Add plotly.
* gnu/packages/statistics.scm (r-plotly): New variable.
gnu: Add viridis.
* gnu/packages/statistics.scm (r-viridis): New variable.
gnu: Add topGO.
* gnu/packages/bioinformatics.scm (r-topgo): New variable.
gnu: Add matrixStats.
* gnu/packages/statistics.scm (r-matrixstats): New variable.
gnu: Add R.rsp.
* gnu/packages/statistics.scm (r-r-rsp): New variable.
gnu: Add R.cache.
* gnu/packages/statistics.scm (r-r-cache): New variable.
gnu: Add R.utils.
* gnu/packages/statistics.scm (r-r-utils): New variable.
gnu: Add R.oo.
* gnu/packages/statistics.scm (r-r-oo): New variable.
gnu: Add R.methodsS3.
* gnu/packages/statistics.scm (r-r-methodss3): New variable.