0.2.0 to 0.2.1:

  * Added Show class constraints to various type signatures to 
    accommodate changes to Num superclass hierarchy in GHC 7.4.
    Thanks to Rémy Mouëza for the patches.

0.1.0 to 0.2.0:

  * Added a top-level /shim/ module to import all the exposed
    modules. Added a version number module

0.1.0:

  * Initial release.