Refactor, try to limit dependencies

src/Dodge/Combine/Graph.hs

@@ -1,7 +1,7 @@
 --{-# LANGUAGE TypeSynonymInstances #-}
 --{-# LANGUAGE FlexibleInstances #-}
 module Dodge.Combine.Graph where
-import Dodge.Data hiding (East,West,North,South)
+import Dodge.Data.Item
 import Dodge.Combine.Combinations
 import LensHelp
 import GraphHelp