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.