* gnu/packages/games.scm (drascula): New variable.

* gnu/packages/gtk.scm (libdbusmenu)[license]: Remove GPL3.  Add comment
about dual-licensing.

* gnu/packages/gtk.scm (libdbusmenu): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/zwave.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

* doc/contributing.texi (Building from Git): Add --pure to "guix environment"
  invocations

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

* guix/self.scm (info-manual)[po4a, gettext]: Remove.

* gnu/packages/game-development.scm (openmw)[inputs]: Replace mygui with
mygui-gl.

* gnu/packages/game-development.scm (mygui-gl): New variable.

* gnu/packages/game-development.scm (mygui)[source]: Use GIT-FETCH and
GIT-FILE-NAME.
[arguments]: Disable Windows-specific demos and tools.

* gnu/packages/statistics.scm (r-glmnet): Update to 2.0-18.

* gnu/packages/statistics.scm (r-knitr): Update to 1.23.

* gnu/packages/statistics.scm (r-digest): Update to 0.6.19.

* gnu/packages/cran.scm (r-ggcorrplot): Update to 0.1.3.

* gnu/packages/cran.scm (r-gridgraphics): Update to 0.4-1.

* gnu/packages/bioinformatics.scm (r-limma): Update to 3.40.2.

* gnu/packages/bioinformatics.scm (r-edger): Update to 3.26.3.

* gnu/packages/bioconductor.scm (r-quasr): Update to 1.24.2.

* gnu/packages/bioconductor.scm (r-rhisat2): Update to 1.0.1.

* gnu/packages/bioconductor.scm (r-regioner): Update to 1.16.2.

* gnu/packages/bioinformatics.scm (r-scater): Update to 1.12.1.

* gnu/packages/bioinformatics.scm (r-seurat): Update to 3.0.1.

* gnu/packages/bioinformatics.scm (r-maldiquant): Update to 1.19.3.

* gnu/packages/bioinformatics.scm (r-edger): Update to 3.26.1.

* gnu/packages/cran.scm (r-dalex): Update to 0.4.

* gnu/packages/cran.scm (r-dqrng): Update to 0.2.1.

* gnu/packages/cran.scm (r-repr): Update to 1.0.1.

* gnu/packages/cran.scm (r-gamlss-dist): Update to 5.1-4.

* gnu/packages/cran.scm (r-fields): Update to 9.8-1.

* gnu/packages/cran.scm (r-bigrquery): Update to 1.1.1.

* gnu/packages/cran.scm (r-grimport): Update to 0.9-2.

* gnu/packages/cran.scm (r-rcppannoy): Update to 0.0.12.

* gnu/packages/cran.scm (r-ggeffects): Update to 0.10.0.

* gnu/packages/cran.scm (r-raster): Update to 2.9-5.

* gnu/packages/cran.scm (r-flextable): Update to 0.5.4.

* gnu/packages/cran.scm (r-insight): Update to 0.3.0.

* gnu/packages/cran.scm (r-snakecase): Update to 0.10.0.

* gnu/packages/cran.scm (r-zip): Update to 2.0.2.

* gnu/packages/cran.scm (r-xfun): Update to 0.7.

* gnu/packages/cran.scm (r-mice): Update to 3.5.0.

* gnu/packages/cran.scm (r-gower): Update to 0.2.1.