[Libvir] Added gettext translation support

The attached patch adds support for translating all text strings in libvirt and virsh using gettext. It also fixes up many error messages, and updates others to use a consistent style - so we don't have lots of slightly differenet translations of the same thing. It also adds an 'autoclean.sh' which deletes all autotools generated junk so you can more easily generate useful patches using diff against a pristine source tree. The patch adds a placeholder en_GB.po file (with no changes). It is expected that real translations for a large number of languages will be completed over course of next couple of months Regards, Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|