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/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