Update puma dependency to version 2.1.1
Update puma dependency to version 2.1.1

sferik/sign-in-with-twitter,ksmetana/rails-app-twitter-test,arrogantgamer/ludum_dare_28,sferik/sign-in-with-twitter,arrogantgamer/ludum_dare_28,sferik/sign-in-with-twitter,ksmetana/rails-app-twitter-test