Update arel dependency to version 2.1.1
Update arel dependency to version 2.1.1

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