Update Rails to 3.2.11

See http://weblog.rubyonrails.org/2013/1/8/Rails-3-2-11-3-1-10-3-0-19-and-2-3-15-have-been-released/

Just wanted to say that I've been planning to create a dashboard app like this for a very long time! So thanks for all your work, and I love the design!