gnu: Have python paths set automatically..

* gnu/packages/xorg.scm (meas): Drop special handling of python paths.
* gnu/packages/xml.scm (libxslt): Drop special handling of python paths.

Merge branch 'core-updates'

gnu: Unify the two intltool packages.

* gnu/packages/xml.scm (intltool): Delete variable.
* gnu/packages/glib.scm (intltool): Update to version 0.50.2.

Merge branch 'xorg' into core-updates

gnu: perl-xml-parser: Fix URL.

* gnu/packages/xml.scm (perl-xml-parser): Fix URL.

gnu: Add intltool.

* gnu/packages/xml.scm (intltool): New variable.
* gnu/packages/xml.scm (perl-xml-parser): Fix download location.

gnu: libxslt: Add zlib and libxml2 python module to inputs.

* gnu/packages/xml.scm (libxslt): Add input zlib and add libxml2 to PYTHONPATH.

gnu: libxml2: Add python support.

* gnu/packages/xml.scm (libxml2): Compile and install python module.

Merge branch 'master' into core-updates

Conflicts:
	Makefile.am
	guix/scripts/gc.scm
	guix/scripts/package.scm
	guix/ui.scm
	tests/guix-package.sh

gnu: Add Perl XML::Parser.

* gnu/packages/xml.scm (perl-xml-parser): New variable.

gnu: Add libxslt.

* gnu/packages/xml.scm (libxslt): New variable.

gnu: Add libxml2.

* gnu/packages/xml.scm (libxml2): New variable.

distro: Change the module name space to (gnu ...).

* distro: Rename to...
* gnu: ... this.  Update module names accordingly.
* Makefile.am: Adjust accordingly.
* po/POTFILES.in: Likewise.
* distro.scm: Search for files under /gnu/packages instead of
  /distro/packages.
* gnu/packages/base.scm (ld-wrapper-boot3): Likewise.

distro: Add Expat.

* distro/packages/xml.scm: New file.
* Makefile.am (MODULES): Add it.