Update module for CVE-2013-0269 - Ruby JSON vulnerabilities

CVE-2013-0269 details a potential denial-of-service, and remote object
creation, attack on Ruby JSON parsing gems. While Razor is generally safe
against these, and doesn't really have much by way of security to bypass with
object creation, we should protect against those.

This updates the module to ensure that a secure version of the JSON gem is
installed, and to default to the new ISO release that also bundles a fixed
version of the JSON gem.

This closes #103.

Signed-off-by: Daniel Pittman <daniel@rimspace.net>
Add generated files to our gitignore

The `pkg` directory and all content is generated during package build, and
should be ignored: they should never enter the repo.

Signed-off-by: Daniel Pittman <daniel@rimspace.net>