The Womble & Womble "no more tears" release

I've jumped the version number significantly here, to bring it in line with
the current protocol version; that'll be the benchmark for a major version
release from now on (since that's the epitomy of non-backwards-compatible).
Things fixed in this release include:

• lvmsync now works again, for everyone;
• It should now work under Ruby 1.8 or later, for those poor sods still
  running RHEL 5;
• Snapback files have their header back, so they look like snapback files
  again;
• Arbitrary LV and VG names should now be recognised and properly escaped;
• htonq works the right way around now;
• The test suite has been fixed so it always invokes the lvmsync under test,
  rather than the system-wide one.

The vast majority of the work involved in this release wasn't done by me,
and I'd like to thank everyone who submitted patches and bug reports for
this release:

• Steven McDonald
• Ryan Egesdahl
• Piotr Dobrowolski
• Roberto Rodriguez Alcala
• Nathan O'Sullivan
• dpeddi
• WMP
• dipohl
• irvintim
• Marcus (localguru)