[scaffold] make the scaffolding buildable

yesod/Scaffolding/Scaffolder.hs

@@ -161,6 +161,7 @@ scaffold = do
     writeFile' "Model.hs" $(codegen "Model.hs")
     writeFile' "Settings.hs" $(codegen "Settings.hs")
     writeFile' "Settings/StaticFiles.hs" $(codegen "Settings/StaticFiles.hs")
+    writeFile' "Settings/Development.hs" $(codegen "Settings/Development.hs")
     writeFile' "static/css/bootstrap.css"
         $(codegen "static/css/bootstrap.css")
     writeFile' "templates/default-layout.hamlet"

yesod/scaffold/Import.hs.cg

@@ -3,6 +3,7 @@ module Import
     , module Yesod
     , module Foundation
     , module Settings.StaticFiles
+    , module Settings.Development
     , module Data.Monoid
     , module Control.Applicative
     , Text

yesod/scaffold/Settings/Development.hs.cg

@@ -1,5 +1,7 @@
 module Settings.Development where
 
+import Prelude
+
 development :: Bool
 development =
 #if DEVELOPMENT

yesod/scaffold/project.cabal.cg

@@ -32,6 +32,7 @@ library
                      Model
                      Settings
                      Settings.StaticFiles
+                     Settings.Development
                      Handler.Home
 
     ghc-options:   -Wall -threaded -O0