support building with yesod-default 1.1.0

Old 1.0.1 version is still supported as well. Cabal autodetects
which version is available, but in the Makefile, WITH_OLD_YESOD
has to be configured appropriately.

I have not squashed all the $newline warnings with the new Yesod.
They should go away eventually anyway as Yesod moves past that transition.

Utility/WebApp.hs

@@ -26,6 +26,7 @@ import Crypto.Random
 import Data.Digest.Pure.SHA
 import qualified Web.ClientSession as CS
 import qualified Data.ByteString.Lazy as L
+import qualified Data.ByteString as B
 import qualified Data.Text as T
 import qualified Data.Text.Encoding as TE
 import Blaze.ByteString.Builder.Char.Utf8 (fromText)
@@ -113,7 +114,7 @@ logRequest req = do
 	where
 		frombs v = toString $ L.fromChunks [v]
 
-lookupRequestField :: CI.CI Ascii -> Wai.Request -> Ascii
+lookupRequestField :: CI.CI B.ByteString -> Wai.Request -> B.ByteString
 lookupRequestField k req = fromMaybe "" . lookup k $ Wai.requestHeaders req
 
 {- Rather than storing a session key on disk, use a random key

Utility/Yesod.hs

@@ -5,13 +5,27 @@
  - Licensed under the GNU GPL version 3 or higher.
  -}
 
+{-# LANGUAGE CPP #-}
+
 module Utility.Yesod where
 
 import Yesod.Default.Util
 import Language.Haskell.TH.Syntax
+#ifndef WITH_OLD_YESOD
+import Data.Default (def)
+import Text.Hamlet
+#endif
 
 widgetFile :: String -> Q Exp
+#ifdef WITH_OLD_YESOD
 widgetFile = widgetFileNoReload
+#else
+widgetFile = widgetFileNoReload $ def
+	{ wfsHamletSettings = defaultHamletSettings
+		{ hamletNewlines = AlwaysNewlines
+		}
+	}
+#endif
 
 hamletTemplate :: FilePath -> FilePath
 hamletTemplate f = globFile "hamlet" f