Added register-settings.php; Updated 'General' and 'Post Visibility' tabs;
Updated options for 'Styles' tab; Added necessary callback functions code;
Fixed issue 'ERROR: options.php not found'
Reverted to using an action hook to call the settings by setting the priority parameter this seemed to work correctly
Added 'Style' settings to the return value for pib_get_settings(); I also removed some commented code that was not needed and also added comments to register-settings.php