* Changed: Replaced wpsc_ce_save_csv_file_attachment() with generic wpsc_ce_save_file_attachment()
* Changed: Replaced wpsc_ce_save_csv_file_guid() with generic wpsc_ce_save_file_guid()
* Changed: Replaced wpsc_ce_save_csv_file_details() with generic wpsc_ce_save_file_details()
* Changed: Replaced wpsc_ce_update_csv_file_detail() with generic wpsc_ce_update_file_detail()
* Changed: Moved wpsc_ce_save_file_details() into common Plugin space
* Changed: Added third allow_empty property to custom get_option()

git-svn-id: https://plugins.svn.wordpress.org/wp-e-commerce-exporter/trunk@913788 b8457f37-d9ea-0310-8a92-e5e31aec5664