allow for very-granular default settings so that updates can make use of default values

includes/wp-option-settings.php

@@ -16,11 +16,16 @@ class WP_Option_Settings {
 	/**
 	 * @param $option_name
 	 * @param array $default_settings
+	 * @param bool|TRUE $granular_defaults
 	 */
-	function __construct( $option_name, $default_settings = array() ){
+	function __construct( $option_name, $default_settings = array(), $granular_defaults = true ){
 		$this->option_name = $option_name;
 		$this->default_settings = $default_settings;
 		$this->values = get_option( $this->option_name, $this->default_settings );
+		
+		if ( $granular_defaults ) {
+			$this->values = array_replace_recursive( $this->default_settings, $this->values );
+		}
 	}
 	
 	function __get( $key ){