Refactor, try to limit dependencies

src/Dodge/Data/Material.hs

@@ -1,12 +1,14 @@
---{-# LANGUAGE TemplateHaskell #-}
 {-# LANGUAGE StrictData #-}
-{-# LANGUAGE FlexibleInstances #-}
-{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE TemplateHaskell #-}
+
+--{-# LANGUAGE FlexibleInstances #-}
+--{-# LANGUAGE DeriveGeneric #-}
 module Dodge.Data.Material where
-import GHC.Generics
+
 import Data.Aeson
+import Data.Aeson.TH
+
 data Material = Wood | Dirt | Stone | Glass | Metal | Crystal | Flesh | Electronics
-  deriving (Eq,Ord,Show,Bounded,Enum,Read,Generic)
-instance ToJSON Material where
-    toEncoding = genericToEncoding defaultOptions
-instance FromJSON Material
+    deriving (Eq, Ord, Show, Bounded, Enum, Read)
+
+deriveJSON defaultOptions ''Material