gnu: Add emacs-minimal.

* gnu/packages/emacs.scm (emacs-minimal): New variable.

gnu: emacs: Remove *.elc and autoloads from the tarball.

* gnu/packages/emacs.scm (emacs)[source]: Add 'snippet' to remove
  compiled and generated elisp files.

gnu: enblend-enfuse: Update to 4.2.

* gnu/packages/photo.scm (enblend-enfuse): Update to 4.2.
[native-inputs]: Add help2man, texlive-minimal.

gnu: grub: Re-enable test.

* gnu/packages/grub.scm (grub)[arguments]: Re-enable test.

graph: Add 'node-reachable-count'.

* guix/graph.scm (node-reachable-count): New procedure.
* tests/graph.scm ("node-reachable-count"): New test.

graph: Expose 'traverse/depth-first'.

* guix/graph.scm (traverse/depth-first): New procedure, based on code
formerly in 'node-transitive-edges'.
(node-transitive-edges): Rewrite in terms of it.

refresh: Make 'list-dependents' a monadic procedure.

* guix/scripts/refresh.scm (list-dependents): Remove use of 'with-store'
and 'run-with-store'.
(guix-refresh): Wrap body in with-store/run-with-store.

gnu: vdirsyncer: Update to 0.11.0.

* gnu/packages/dav.scm (vdirsyncer): Update to 0.11.0.

gnu: git: Update to 2.8.3.

* gnu/packages/version-control.scm (git): Update to 2.8.3.
(git-manpages)[source]: Update hash.

gnu: Add r-zoo.

* gnu/packages/statistics.scm (r-zoo): New variable.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu: borg: Update to 1.0.3.

* gnu/packages/backup.scm (borg): Update to 1.0.3.
[source]: Remove pypi-uri.

union: Compare inode numbers in 'file=?'.

* guix/build/union.scm (file=?): Compare the inode of ST1 and ST2.

cve: Remove now unnecessary HTTP caching.

* guix/cve.scm (call-with-cve-port): Use 'http-fetch' instead of
'http-fetch/cached'.

cve: Keep a summarized sexp in cache instead of the full XML.

This avoids ~20s of XML parsing when running 'guix lint -c cve'.

* guix/cve.scm (vulnerability->sexp, sexp->vulnerability)
(fetch-vulnerabilities): New procedures.
(current-vulnerabilities): Use 'fetch-vulnerabilities'.

gnu: Add poppler-qt5.

* gnu/packages/pdf.scm (poppler-qt5): New variable.

Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

gnu: Add slurm-drmaa.

* gnu/packages/parallel.scm (slurm-drmaa): New variable.

gnu: Add ParDRe.

* gnu/packages/bioinformatics.scm (pardre): New variable.

gnu: gnu-pw-mgr: Update to 2.0.

* gnu/packages/gnu-pw-mgr.scm (gnu-pw-mgr): Update to 2.0.

gnu: imagemagick: Update to 6.9.4-4.

* gnu/packages/imagemagick.scm (imagemagick): Update to 6.9.4-4.

gnu: Add python2-rope.

* gnu/packages/python.scm (python2-rope): New variable.