* Changed: Moved Category sorting to WordPress action
* Changed: Moved Product Tag sorting to WordPress action
* Fixed: Better detection of invalid export filenames
* Changed: Updated all references of plural options to singular
* Added: Date format option to Settings screen

git-svn-id: https://plugins.svn.wordpress.org/exchange-addon-exporter/trunk@975301 b8457f37-d9ea-0310-8a92-e5e31aec5664