merging sqlite and bs branches

Since the sqlite branch uses blobs extensively, there are some
performance benefits, ByteStrings now get stored and retrieved w/o
conversion in some cases like in Database.Export.

Annex/Version.hs

@@ -6,11 +6,13 @@
  -}
 
 {-# LANGUAGE CPP #-}
+{-# LANGUAGE OverloadedStrings #-}
 
 module Annex.Version where
 
 import Annex.Common
 import Config
+import Git.Types
 import Types.RepoVersion
 import qualified Annex