Add versions of nori that were pacthed for CVE 2013-0285.

According to:
https://support.cloud.engineyard.com/entries/22915701-january-14-2013-security-vulnerabilities-httparty-extlib-crack-nori-update-these-gems-immediately
https://github.com/savonrb/nori/commit/2ca6f8603e406f884a8fcea6bc26f8f6bf168f40
https://github.com/savonrb/nori/commit/d9b68667249b98776fb23ba9e9c548dc4b524709