hashed-storage 0.4.0
====================

- Index now uses a 32-byte representation for sha256 hashes, instead of a
  64-byte ascii-hex (base16) encoding.
- New module Storage.Hashed.Hash that exports a new incarnation of Hash data
  type and a number of utilities.
- The Tree type is overloaded over a monad type and is not bound to IO monad
  anymore.
- Index has been streamlined, the API has improved safety and the code has been
  extensively optimised.
- Support for creating new hashed trees with the <size>-<hash> format used in
  darcs 2.0.2 and newer has been dropped.
