version 1.0001 - September 28, 2014 * Declaired Data::GUID dependency. version 1.0000 - June 23, 2014 * No longer a wrapper of a web service. Exposed code behind the web service as it's own public module. version 0.0501 - Novemver 6, 2012 * Fix some cosmetic problems. * Added some parameter validation for the shipping_options method. version 0.0500 - November 6, 2012 * NOT backwards compatible. * Now works asynchronously. * Add SSL to web service. * Add shipping_options method which returns USPS postage rate calculations. version 0.0400 - October 25, 2012 * First public release to web service.