Bump git ref to fix Rails CVE-2013-0155 and CVE-2013-0156


commit dcc038eebd7c9dfb34ef0130c5b295117ece4d47
Author: Dale Olds <ssweda+olds@rbcon.com>

    Enforce token signature policy.

commit dc8420e5c2d943f8022a0df978557ea5f6c09cf4
Author: Bob Nugmanov <bnugmanov@vmware.com>

    disable xml parsing

commit 8c81a227ff49795d2999d65e17be5b036cf64e84
Author: Dr Nic Williams <drnicwilliams@gmail.com>

    Always define AppConfig to get the nice error
Release 1.3.7: fix Rails vulnerabilities.