related to #534 update ruby version to 1.9.3-p429

related to #534 

Given the update 1.9.3-p429 update and various security patches between 1.9.3-p0 and 1.9.3-p429, an update would be good.

Do the AWS cookbooks need to be updated? If so, given a little direction, I'd love to move this through to production.