Updated rails for security vulns

    Updated rails so we don't get bitten by the JSON bug.
    
    CVE-2013-0276
    CVE-2013-0277
    
    http://weblog.rubyonrails.org/2013/2/11/SEC-ANN-Rails-3-2-12-3-1-11-and-2-3-17-have-been-released/