gnu: Add default gcc-objc++. * gnu/packages/gcc.scm (gcc-objc++): New variable.
gnu: Add gcc-objc++-4.9. * gnu/packages/gcc.scm (gcc-objc++-4.9): New variable.
gnu: Add default gcc-objc. * gnu/packages/gcc.scm (gcc-objc): New variable.
gnu: Add gcc-objc-4.9. * gnu/packages/gcc.scm (gcc-objc-4.9): New variable.
gnu: r-rcpparmadillo: Update to 0.6.700.6.0. * gnu/packages/statistics.scm (r-rcpparmadillo): Update to 0.6.700.6.0. * gnu/packages/maths.scm (armadillo-for-rcpparmadillo): Update to 6.700.6.
gnu: armadillo: Update to 6.700.7. * gnu/packages/maths.scm (armadillo): Update to 6.700.7.
gnu: r-genomation: Update to 1.4.2. * gnu/packages/bioinformatics.scm (r-genomation): Update to 1.4.2.
gnu: r-jsonlite: Update to 0.9.20. * gnu/packages/web.scm (r-jsonlite): Update to 0.9.20.
gnu: r-plotly: Update to 3.6.0. * gnu/packages/statistics.scm (r-plotly): Update to 3.6.0.
gnu: r-matrixstats: Update to 0.50.2. * gnu/packages/statistics.scm (r-matrixstats): Update to 0.50.2.
gnu: r-r-rsp: Update to 0.30.0. * gnu/packages/statistics.scm (r-r-rsp): Update to 0.30.0.
gnu: r-rmarkdown: Update to 0.9.6. * gnu/packages/statistics.scm (r-rmarkdown): Update to 0.9.6.
gnu: r-plotrix: Update to 3.6-2. * gnu/packages/statistics.scm (r-plotrix): Update to 3.6-2.
gnu: r-devtools: Update to 1.11.1. * gnu/packages/statistics.scm (r-devtools): Update to 1.11.1.
gnu: r-git2r: Update to 0.15.0. * gnu/packages/statistics.scm (r-git2r): Update to 0.15.0.
gnu: r-openssl: Update to 0.9.3. * gnu/packages/statistics.scm (r-openssl): Update to 0.9.3.
gnu: r-testthat: Update to 1.0.2. * gnu/packages/statistics.scm (r-testthat): Update to 1.0.2.
gnu: r-knitr: Update to 1.13. * gnu/packages/statistics.scm (r-knitr): Update to 1.13.
gnu: r-highr: Update to 0.6. * gnu/packages/statistics.scm (r-highr): Update to 0.6.
gnu: r-formatr: Update to 1.4. * gnu/packages/statistics.scm (r-formatr): Update to 1.4.