Provide example in README

README.md

@@ -1 +1,29 @@
 # gql2hs
+
+## Usage
+
+    λ gql2hs << EOF
+    enum Bool {
+      FALSE
+      TRUE
+    }
+
+    scalar True
+    scalar False
+
+    union Boolean = True | False
+
+    type Record {
+      a: A
+      b: B!
+      c: [C!]!
+      d(e: E): D
+    }
+    EOF
+    data Bool = FALSE
+              | TRUE
+    type True = ()
+    type False = ()
+    data Boolean = Boolean__0 True
+                 | Boolean__1 False
+    data Record = Record{a :: A, b :: B, c :: C, d :: E -> D}