v0.1.0dev, 09/28/2012 -- Initial release.

v0.1.0, 09/28/2012 -- First Released Version.
  Initial implementation of writing of .pkpass files

v0.2.0, 10/01/2012 -- Bugfixes and json properties serialization

v0.2.1, 10/02/2012 -- Bugfix

v0.2.3, 10/31/2012 -- Better handling of Passbook's optional parameters. Improved documentation.
