Merge branch 'master' into core-updates

AUTHORS

Makefile.am

doc/guix.texi

gnu-system.am

gnu/packages.scm

gnu/packages/apl.scm

gnu/packages/audio.scm

gnu/packages/bioinformatics.scm

gnu/packages/commencement.scm

gnu/packages/emacs.scm

gnu/packages/fcitx.scm

gnu/packages/freedesktop.scm

gnu/packages/gd.scm

gnu/packages/gnome.scm

gnu/packages/gnuzilla.scm

gnu/packages/gstreamer.scm

gnu/packages/gtk.scm

gnu/packages/haskell.scm

gnu/packages/imagemagick.scm

gnu/packages/julia.scm