Updated rails (due to security issues in activesupport and sprockets).

Gemnasium complained about activesupport and sprockets being outdated in "my fork", so I updated them. Then I thought, I could just make a pull request, as well.

http://weblog.rubyonrails.org/2014/10/30/Rails_3_2_20_4_0_11_4_1_7_and_4_2_0_beta3_have_been_released/

Happy day after Halloween!