Cabal revisions of yesod-1.4.1

Hackage metadata revisions edit the .cabal file after upload; each diff below is one revision.

 name:            yesod version:         1.4.1+x-revision: 1 license:         MIT license-file:    LICENSE author:          Michael Snoyman <michael@snoyman.com>                    , transformers              >= 0.2.2                    , wai                       >= 1.3                    , wai-extra                 >= 1.3-                   , warp                      >= 1.3+                   , warp                      >= 1.3 && < 3.1                    , blaze-html                >= 0.5                    , blaze-markup              >= 0.5.1                    , aeson