Move record utilities to (guix records).

* guix/utils.scm (define-record-type*): Move to...
* guix/records.scm: ... here.  New file.
* guix/build-system.scm, guix/packages.scm: Use it.
* guix/gnu-maintenance.scm: Likewise.
  (official-gnu-packages)[alist->record]: Remove.
* guix/scripts/substitute-binary.scm: Likewise.
  (alist->record, object->fields): Remove.
* tests/utils.scm ("define-record-type*", "define-record-type* with
  letrec* behavior", "define-record-type* & inherit",
  "define-record-type* & inherit & letrec* behavior",
  "define-record-type* & thunked", "define-record-type* & thunked &
  default", "define-record-type* & thunked & inherited"): Move to...
* tests/records.scm: ... here.  New file.

gnu: Add GNU RCS.

* gnu/packages/bazaar.scm: Rename to...
* gnu/packages/version-control.scm: ... this.
  (rcs): New variable.
* Makefile.am (MODULES): Adjust accordingly.

build: Really clean .log files from SRFI-64.

* Makefile.am (CLEANFILES): Really catch .log files from SRFI-64.

build: Run `tests/guix-gc.sh' last to avoid test failures.

* Makefile.am (tests/guix-gc.log): New target.  This should fix failures
  that occurred with "make check -j" the first time.

gnu: Add Scheme48.

* gnu/packages/scheme.scm (scheme48): New variable.
* gnu/packages/patches/scheme48-tests.patch: New file.
* Makefile.am (dist_patch_DATA): Add it.

tests: Add `guix hash' test.

* guix/scripts/hash.scm (guix-hash)[eof->null]: New procedure.
  Use it to convert the EOF object to the empty bytevector.
* tests/guix-hash.sh: New file.
* Makefile.am (SH_TESTS): Add it.

gnu: Add GNU Bazaar.

* gnu/packages/bazaar.scm: New file.
* Makefile.am (MODULES): Add it.

Add 'python-build-system'.

* guix/build-system/python.scm, guix/build/python-build-system.scm: New files.
* Makefile.am (MODULES): Add them.

Add (guix build rpath).

* guix/build/rpath.scm: New file.
* Makefile.am (MODULES): Add it.
* gnu/packages/python.scm (python): Use it; remove local copy of
  the *rpath* procedures.
* gnu/packages/samba.scm (samba): Likewise.

gnu: Add cryptsetup.

* gnu/packages/cryptsetup.scm: New file.
* Makefile.am (MODULES): Add it.

gnu: Add lvm2.

* gnu/packages/lvm.scm: New file.
* Makefile.am (MODULES): Add it.

gnu: Add Hugs.

* gnu/packages/hugs.scm: New file.
* Makefile.am (MODULES): Add it.

gnu: Add GNU FreeIPMI.

* gnu/packages/freeipmi.scm: New file.
* Makefile.am (MODULES): Add it.

gnu: gv: Move to a separate file.

* gnu/packages/ghostscript.scm (ghostscript): Remove libxext and libxt
  as inputs.
  (gv): Move to...
* gnu/packages/gv.scm (gv): ... here.  New file.
  (ghostscript/x): Variant of GHOSTSCRIPT with libxt and libxext as
  inputs.

gnu: Add atk.

* gnu/packages/gtk.scm: New module.
* Makefile.am (MODULES): Add it.

Merge branch 'core-updates'

build: Add silent-rules machinery for `guild compile'.

* Makefile.am (AM_V_GUILEC, AM_V_GUILEC_, AM_V_GUILEC_0): New
  variables.
  (.scm.go): Use $(AM_V_GUILEC).

build: Replace *.log in `CLEANFILES' by the exact list of files.

* Makefile.am (SCM_TESTS, SH_TESTS): New variables.
  (TESTS): Use them.
  (CLEANFILES): Replace *.log by $(SCM_TESTS:%.scm=%.log).

Merge branch 'master' into core-updates

Conflicts:
	Makefile.am
	gnu/packages/autotools.scm
	gnu/packages/guile.scm
	gnu/packages/python.scm
	gnu/packages/shishi.scm
	guix/gnu-maintenance.scm
	guix/scripts/build.scm
	guix/scripts/gc.scm
	guix/scripts/package.scm
	guix/scripts/substitute-binary.scm
	guix/ui.scm
	nix/nix-daemon/guix-daemon.cc
	test-env.in
	tests/nar.scm
	tests/store.scm

web: Factorize `http-get' hackery.

This should fix `substitute-binary --query' on Guile 2.0.5.

* guix/web.scm: New file.
* Makefile.am (MODULES): Add it.
* po/POTFILES.in: Add it.
* guix/gnu-maintenance.scm (http-fetch): Remove.
  (%package-list-url): Turn into a URI.
  (official-gnu-packages): Add #:text? #t to `http-fetch' call.
* guix/scripts/substitute-binary.scm (fetch): Remove `http' case, and
  use `http-fetch' instead.