/*What done in this plugin
1. Renamed CEI_Core to Acme_Demo_Setup_CEI_Core
2. Modify _import method to pass input of file
3. Renamed CEI_Option to Acme_Demo_Setup_CEI_Option
4. Remaning wie_available_widgets to acme_demo_setup_wie_available_widgets
5. Renaming wie_process_import_file to acme_demo_setup_wie_process_import_file
6. Renaming wie_import_data to acme_demo_setup_wie_import_data
7. Renaming WP_Import to Acme_Demo_Setup_Wp_Import
8. Renaming WXR_Parser to Acme_Demo_Setup_WXR_Parser
9. Renaming WXR_Parser_SimpleXML to Acme_Demo_Setup_WXR_Parser_SimpleXML
10. Renaming WXR_Parser_XML to Acme_Demo_Setup_WXR_Parser_XML
11. Renaming WXR_Parser_Regex to Acme_Demo_Setup_WXR_Parser_Regex
11. Remove unnecessary methods and functions
*/