gnu: Add python-testpath. * gnu/packages/python.scm (python-testpath, python2-testpath): New variables.
gnu: Add python-ipykernel. * gnu/packages/python.scm (python-ipykernel, python2-ipykernel): New variables.
gnu: Add python-jupyter-client. * gnu/packages/python.scm (python-jupyter-client, python2-jupyter-client): New variables.
gnu: Add python-jupyter-core. * gnu/packages/python.scm (python-jupyter-core, python2-jupyter-core): New variables.
gnu: python-traitlets: Update to 4.2.0. * gnu/packages/python.scm (python-traitlets): Update to 4.2.0.
gnu: Add font-adobe-source-code-pro. * gnu/packages/fonts.scm (font-adobe-source-code-pro): New variable.
gnu: Add geteltorito. * gnu/packages/cdrom.scm (geteltorito): New variable.
gnu: maxima: Update to 5.38.1. * gnu/packages/maths.scm (maxima): Update to 5.38.1.
gnu: starfighter: Update to 1.6. * gnu/packages/games.scm (starfighter): Update to 1.6.
gnu: r-rcas: Update to 1.0.0. * gnu/packages/bioinformatics.scm (r-rcas): Update to 1.0.0.
gnu: r-rtracklayer: Update to 1.34.1. * gnu/packages/bioinformatics.scm (r-rtracklayer): Update to 1.34.1.
gnu: r-biocparallel: Update to 1.8.1. * gnu/packages/bioinformatics.scm (r-biocparallel): Update to 1.8.1.
gnu: r-limma: Update to 3.30.2. * gnu/packages/bioinformatics.scm (r-limma): Update to 3.30.2.
gnu: r-edger: Update to 3.16.1. * gnu/packages/bioinformatics.scm (r-edger): Update to 3.16.1.
gnu: r-hmisc: Update to 4.0.0. * gnu/packages/statistics.scm (r-hmisc): Update to 4.0.0. [propagated-inputs]: Add r-htmltable, r-htmltools, r-viridis, r-survival.
gnu: r-r-oo: Update to 1.21.0. * gnu/packages/statistics.scm (r-r-oo): Update to 1.21.0.
gnu: r-openssl: Update to 0.9.5. * gnu/packages/statistics.scm (r-openssl): Update to 0.9.5.
gnu: r-checkmate: Update to 1.8.2. * gnu/packages/statistics.scm (r-checkmate): Update to 1.8.2.
gnu: r-acepack: Update to 1.4.1. * gnu/packages/statistics.scm (r-acepack): Update to 1.4.1.
gnu: r-gdtools: Update to 0.1.1. * gnu/packages/statistics.scm (r-gdtools): Update to 0.1.1. [propagated-inputs]: Add r-withr.