Update rack dependency to version 1.4.5
Update rack dependency to version 1.4.5

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