gnu: Add Piranha.

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

gnu: python2-pandas: Fix native-inputs.

* gnu/packages/python.scm (python2-pandas)[native-inputs]: Use python2-
versions of python-panda's native-inputs, not of inputs.

gnu: Add signify.

* gnu/packages/crypto.scm (signify): New variable.

gnu: libndp: Update to 1.6 [fixes CVE-2016-3698].

* gnu/packages/networking.scm (libndp): Update to 1.6.

gnu: Add emacs-zenburn-theme.

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

Signed-off-by: Alex Kost <alezost@gmail.com>

gnu: gd: Fix-CVE-2016-3074.

* gnu/packages/patches/gd-CVE-2016-3074.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/gd.scm (gd)[source]: Use it.

gnu: gd: Specify 'cpe-name'.

* gnu/packages/gd.scm (gd)[properties]: New field.

lint: Honor 'cpe-name' and 'cpe-version' package properties.

* guix/scripts/lint.scm (package-name->cpe-name): Remove.
(package-vulnerabilities): Honor 'cpe-name' and 'cpe-version'
properties.
* gnu/packages/grub.scm (grub)[properties]: New field.
* gnu/packages/gnuzilla.scm (icecat)[properties]: Add 'cpe-name' and
'cpe-version'.
* doc/guix.texi (Invoking guix lint): Mention 'cpe-name'.

gnu: emacs-constants: Remove old patch.

* gnu/packages/patches/emacs-constants-lisp-like.patch: Remove it.
* gnu/local.mk (dist_patch_DATA): Remove entry for above patch.

store: Clarify 'query-path-hash' docstring.

* guix/store.scm (query-path-hash): Clarify docstring.

import: Gracefully report import failures.

Previously, something like 'guix import gnu which' would spit out a
backtrace if, say, the 'which' tarball could not be authenticated.

* guix/upstream.scm (download-tarball): Mention failure modes in
docstring.
* guix/import/gnu.scm (gnu-package->sexp): Return #f when
'download-tarball' returns #f.
* guix/scripts/import.scm (guix-import): Call 'leave' when IMPORTER does
not return a (package ...) sexp.

import: Exit with non-zero when an unknown importer is asked.

* guix/scripts/import.scm (guix-import): Use 'leave' instead of 'format'
when IMPORTER is unknown.

gnu: emacs-constants: Update to 2.6.

* gnu/packages/emacs.scm (emacs-constants): Change to versioned repository and
  update to 2.6.

gnu: sortmerna: Update to 2.1b.

* gnu/packages/bioinformatics.scm (sortmerna): Update to 2.1b.
[inputs]: New field.

gnu: vsearch: Update to 1.11.1.

* gnu/packages/bioinformatics.scm (vsearch): Update to 1.11.1.

gnu: diamond: Update to 0.8.1.

* gnu/packages/bioinformatics.scm (diamond): Update to 0.8.1.
[source]: Remove 'snippet'.
[build-system]: Use cmake-build-system.
[arguments]: Remove modifications to phases.
[native-inputs]: Remove field.
[inputs]: Remove 'boost'.

gnu: emacs-constants: Factorize home-page in source URL.

* gnu/packages/emacs.scm (emacs-constants): Move 'home-page' above.  Use
it in 'uri'.

gnu: 'uncompressed-file-fetch' no longer depends on gzip.

* gnu/packages/emacs.scm (uncompressed-file-fetch): Remove dependency on
GZIP.

gnu: cflow: Update to 1.5.

* gnu/packages/code.scm (cflow): Update to 1.5.

gnu: Add geiser-next.

Also, I previously committed to this repository in 2015; add self to copyright
headers for that year too.

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