build: Bump to version 0.8.

* configure.ac: Switch to 0.8.

Require only lower gettext version.

* configure.ac: Change back to requiring gettext at least 0.18.1, partially
    reverting commit ee76417.

Merge branch 'master' into core-updates

Separate package description translations from string translations.

* po/packages/LINGUAS, po/packages/Makevars, po/packages/POTFILES.in:
  New files.
* po/guix/Makevars (DOMAIN): Change to "guix".
  (XGETTEXT_OPTIONS): Remove "--keyword=synopsis --keyword=description".
* po/guix/POTFILES.in: Remove gnu/packages/*.scm.
* configure.ac: Change to gettext 0.18.3.  Produce
  po/packages/Makefile.in.
* Makefile.am (SUBDIRS): Add po/packages.
* guix/ui.scm (%package-text-domain): New variable.
  (P_): New procedure.
  (package->recutils): Use 'P_' instead of '_'.
* guix/scripts/package.scm (find-packages-by-description): Use 'P_'
  instead of 'gettext'.

Move gettext files to 'po/guix'.

* po: Rename to...
* po/guix: ... this.
* po/guix/Makevars (subdir, top_builddir): Adjust accordingly.
* configure.ac: Change 'po/Makefile.in' to 'po/guix/Makefile.in'.
* Makefile.am (SUBDIRS): Change 'po' to 'po/guix'.

Merge branch 'master' into core-updates

build: Fix builds without --with-libgcrypt-prefix nor --with-libgcrypt-libdir.

Reported by Manolis Ragkousis <manolis837@gmail.com>.
Fixes a regression introduced in 14af289.

Before this commit, ./configure would leave LIBGCRYPT_PREFIX and
LIBGCRYPT_LIBDIR undefined, leading to LIBGCRYPT_LIBS="-L -lgcrypt" and
thus to a link failure.

* configure.ac: Make sure $LIBGCRYPT_PREFIX and $LIBGCRYPT_LIBDIR are
  never empty.

build: Add --with-libgcrypt-libdir=DIR to support Debian's multi-arch layout.

* configure.ac: Remove 'LIBGCRYPT_PREFIX' and use 'LIBGCRYPT_LIBDIR'
  instead.  Add --with-libgcrypt-libdir=DIR option.
* Makefile.am (AM_DISTCHECK_CONFIGURE_FLAGS): Pass
  '--with-libgcrypt-libdir'.
* config-daemon.ac: Honor $LIBGCRYPT_LIBDIR when computing
  LIBGCRYPT_LIBS.

build: Bump to version 0.7.

* configure.ac: Switch to 0.7.

Merge branch 'master' into core-updates

Change the default store file name to /gnu/store.

* configure.ac: Change the default 'storedir' to /gnu/store.  Print
  $storedir.
* doc/guix.texi: Replace "/nix/store" by "/gnu/store", except where
  describing Nix compatibility.
* Makefile.am: Likewise.

Merge branch 'master' into core-updates

store: Add 'register-path' procedure.

* guix/store.scm (register-path): New procedure.
* tests/store.scm ("register-path"): New test.
* guix/config.scm.in (%guix-register-program): New variable.
* configure.ac: Compute and substitute 'guix_sbindir'.  Compute
  'guix_prefix'.
* pre-inst-env.in: Define 'GUIX_REGISTER'.

Merge branch 'master' into core-updates

build: Improve documentation of Nix-related options.

* configure.ac: Add documentation for --with-nix and --with-nixpkgs.

config: Export '%config-directory'.

* configure.ac: Define and substitute 'guix_sysconfdir'.
* guix/config.scm.in (%config-directory): New variable.

build: Bump to version 0.6.

* configure.ac: Switch to 0.6.

build: Make sure pkg.m4 is present.

Suggested by John Darrington <john@darrington.wattle.id.au>.

* configure.ac: Forbid occurrences of 'PKG_CHECK_MODULES' in the
  output.

build: Bump version to 0.5.

* configure.ac: Switch to 0.5.

Merge branch 'master' into core-updates