Expose Box index flags in PDF and PDF.Layer

src/PDF.hs

@@ -2,7 +2,10 @@
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 module PDF (
-      Document(..)
+      AllLayers(..)
+    , Document(..)
+    , EOLStyleK(..)
+    , UnifiedLayers(..)
     , parseDocument
     , render
   ) where

src/PDF/Layer.hs

@@ -2,7 +2,8 @@
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 module PDF.Layer (
-      Layer(..)
+      AllObjects(..)
+    , Layer(..)
     , unify
   ) where