New mallard-rng release

Hi all,

I've made a new release of the mallard-rng package:

http://projectmallard.org/download/

This is the package that provides local copies of all final schemas
hosted on projectmallard.org. It integrates with XML catalogs so that
you can validate off a local copy while referencing the canonical URI.
This all happens behind the scenes if you use yelp-check.

Unfortunately, the XML schema integration was overzealous, and it
prevented you from validating against non-final schemas that you should
have to hit the network for. I've fixed that.

--
Shaun