Add sale note`s on anet CIM features

[JustinSainton]

Store errors/success messages for easier debugging.

wp-content\plugins\gold-cart\merchants\wpec_auth_net\classes\wpec_auth_net.class.php

Lines 600 - 604 and 609 - 613

            $purchase_log = new WPSC_Purchase_Log( $this->cart_data['session_id'], 'sessionid' );
            $purchase_log->set( array(
                'notes'      => 'Anet status: ' . $this->response->authorization_code,
            ) );
            $purchase_log->save();

609-613

            $purchase_log = new WPSC_Purchase_Log( $this->cart_data['session_id'], 'sessionid' );
            $purchase_log->set( array(
                'notes'      => 'Anet status: ' . $this->response->response_reason_text,
            ) );
            $purchase_log->save();

[JustinSainton]

wpsc_add_purchase_meta( $this->purchase_id, 'anet_gateway_response_value', $this->response->response_reason_text, true);