First commit of partial RosettaCode contents.

Pushing this for testing purposes. Lots of work still needed.

Task/JSON/Haskell/json.hs

@@ -0,0 +1,24 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+import Data.Aeson
+import Data.Attoparsec (parseOnly)
+import Data.Text
+import qualified Data.ByteString.Lazy.Char8 as B
+import qualified Data.ByteString.Char8 as S
+
+testdoc = object [
+    "foo"   .= (1 :: Int),
+    "bar"   .= ([1.3, 1.6, 1.9] :: [Double]),
+    "baz"   .= ("some string" :: Text),
+    "other" .= object [
+        "yes" .= ("sir" :: Text)
+        ]
+    ]
+
+main = do
+    let out = encode testdoc
+    B.putStrLn out
+    case parseOnly json (S.concat $ B.toChunks out) of
+        Left e -> error $ "strange error re-parsing json: " ++ (show e)
+        Right v | v /= testdoc -> error "documents not equal!"
+        Right v | otherwise    -> print v